HST Showdown - (Round 6 - Villainous Façades)

[Stryker861]

That can very easily be taken as an NLF. If it doesn't have feats of defending against phasing intangibility then you can't assume it can without those feats. Even if it did, Shanks could just ya know hit him with it before he pulls out the Susanoo.

its not a NLF, it changes its properties to match whatever it faces allowing it to power null

 

[LordGinSama]

I feel like I’ve said this several times but I’ll do it again I guess, Itachi has a bunch of ways to keep Shanks at a distance or from hitting him. Substitution, shunshin, Susanoo, looking him in the eyes, clones, AOE, etc.

All of which get countered by Advanced Kenbunshoku.


Substitution? Shanks knows where the real Itachi is and attacks there. Speed amp? 10 seconds ahead GG. Kenbunshoku tells him to close his eyes. Itachi ain't Naruto and Hao blasts take care of them. Itachi's AoE isn't big enough to negate precognition.

Not to mention this weird idea in your head that Shanks always instantly goes for a kill shot.

He does it based upon FS and the danger in that future.

in his fight with Kidd, he sees Kidd hurt his comrades with FS and instantly attacks him with bloodlusted anger.

This is false, Shanks goes for the kill in character if he senses danger in the future.

This kind of thing isn’t a standard move for Shanks in normal combat, even Novels say that Shanks is a different person when his loved ones are in danger so stop acting like the fight starts with Shanks instantly flying over to Itachi and ignores Gin just to one shot Itachi.

Shanks isn't stupid either, again if he sees danger in the future he's gonna try to avoid it immediately. Stop with your bullshit headcanon.

Even if Shanks lead with FS he won’t see himself getting genjutsu right away because of the range,

Shanks has the better sensing range by leaps and bounds so no.

nor would Itachi approach Shanks himself to start the fight. He would lead with strategy over anything else via clones and light genjutsu to see how Shanks reacts.

He'd have to target Shanks first, and again Hao. Just because you wanna ignore it out of sheer dismissal I'm not gonna stop using it.

given the huge intelligence gap and the equal stats, and superior skill Itachi has, it’s very likely that he could keep him at a distance and make a plan especially since all he needs to do is look him in the eyes to end it with Tsukuyomi.

Again first of all, the intelligence gap isn't as big as your inflating it to be. Itachi being a "super genius." doesn't automatically make him Rick or some type of Kengan / Baki character. That rating is useless without context and from reading it I'm not seeing anything astronomically above what Shanks or Gin are capable of dealing with.


Itachi isn't even more skilled than Shanks first of all, he isn't a swordsman like Shanks is. Secondly, Shanks scales to Mihawk who scales astronomically above Zoro who has better swordsmanship than anything in Naruto as far as I'm aware.


two different types of skill sets, Itachi is not more skilled than Shanks in his field because they are not the same type of combatant. Your heavily overestimating Itachi's intelligence as if he's Bruce Wayne while also downplaying others.

Not to mention Susanoo manifests incredibly fast.

Not before Shanks sees it then Buso's. Don't say he won't either whenever he's a literal Haki specialist, that's the only thing he can do basically.

Quit your malding boy

Take your own advice kiddo.

 

[LordGinSama]

its not a NLF, it changes its properties to match whatever it faces allowing it to power null

Again that's a blatant NLF. So it can adapt to concepts? Reality warping? BFR? Law Manipulation? Fate hax? Just because its stated to "adapt to all things." doesn't mean you can take it at full face value without any supportive evidence. Your acting like he's Doomsday.

 

[Kachon123]

Not to mention this weird idea in your head that Shanks always instantly goes for a kill shot.

Look at his fight with Kizaru, his fight with Kid, his "fight" with Greenbull, his crew fight with Higuma the Bear.

He's always gone for an instant win when he can. He doesn't believe in stalling.

 

[Epiccheev]

Your acting like he's Doomsday.

Or worse, saying he adapts like Garou.

 

[Yoh_Asakura8]

He always been shown to finish things quick even at the start of the manga. "Guns aren't meant for threats?" His mentality to wrap up was always there. But ofc tge guy smoke bombed to get away.

 

[Stryker861]

Again that's a blatant NLF. So it can adapt to concepts? Reality warping? BFR? Law Manipulation? Fate hax? Just because its stated to "adapt to all things." doesn't mean you can take it at full face value without any supportive evidence. Your acting like he's Doomsday.

this just seems like increduality, not like those matter in the context of the fight anyway. the point is that laws attaks would not work against it. the descriptoin litterally tells us that it doesent matter if the attacks are physcal or not, it wont work

 

[Godernet]

All of which get countered by Advanced Kenbunshoku.


Substitution? Shanks knows where the real Itachi is and attacks there. Speed amp? 10 seconds ahead GG.

You misinterpret the utility of substitution in this fight. It won't be for hiding but making distance to buy Itachi time to make multilayered plans, which are his staple. The fact that you're still arguing that those jutsu I listed would be actual attempts to put Shanks down and not misdirections made to buy him time just shows me you don't understand how Naruto people fight lol.

This is false, Shanks goes for the kill in character if he senses danger in the future.

based on?

Shanks isn't stupid either, again if he sees danger in the future he's gonna try to avoid it immediately. Stop with your bullshit headcanon.

what part of that was headcanon? this is literally stated in the Ace Novel

He'd have to target Shanks first, and again Hao. Just because you wanna ignore it out of sheer dismissal I'm not gonna stop using it.

when did I ignore it? , I addressed it again in the post that it wouldn't work on Itachi due to superior resistances. Stop trying to make up a narrative and read the posts for once.

Again first of all, the intelligence gap isn't as big as your inflating it to be. Itachi being a "super genius." doesn't automatically make him Rick or some type of Kengan / Baki character. That rating is useless without context and from reading it I'm not seeing anything astronomically above what Shanks or Gin are capable of dealing with.

Go read Itachis profile then. there's a huge difference between someone who's vastly smarter than people with stated 200 iq in strategy and combat intelligence and Shanks, whose best combat-applicable intelligence lore is "two decades of combat experience". you just severely underestimate the gap here.

Itachi isn't even more skilled than Shanks first of all, he isn't a swordsman like Shanks is.

why would Itachi need to be a swordmans to be more skilled than Shanks. Please read this again and think about it while realizing Shanks has no intelligence or skill feats at all comparable to Itachi's. And if you still don't get it go read Itachi's intelligence section once or twice.

Secondly, Shanks scales to Mihawk who scales astronomically above Zoro who has better swordsmanship than anything in Naruto as far as I'm aware.

who said anything about swordsmanship? Combat skill isn't limited to sword techniques and the fact that it seems to be all you can come up with in reference to Shank's skill just further shows that Itachi >>>> Shanks.

two different types of skill sets, Itachi is not more skilled than Shanks in his field because they are not the same type of combatant.

two different styles of combat doesn't mean the attributes of combat intelligence they would be using differ, Itachi had far better strategic, general, and combat IQ feats along with far better statements.

Your heavily overestimating Itachi's intelligence as if he's Bruce Wayne

ironic that they're currently in the same tier of intelligence on site lol

while also downplaying others.

I haven't downplayed Shanks. Nothing that I brought up is incorrect. he has inferior feats, no statements, no lore that would put him in the same class as Itachi.

Prove that he is anywhere near Itachi.

If anything y'all wank some of the OP characters IQ(but that'll be for a different day)

Not before Shanks sees it then Buso's. Don't say he won't either whenever he's a literal Haki specialist, that's the only thing he can do basically.

But the point that you're missing is that Itachi is a slimy dude, he wouldn't try to match Shanks if he came flying at him, he would escape and observe until he has an understanding of Shanks. There's no argument that could be made for Shanks to oneshot Itachi before he uses one of his many escape jutsu to create distance and keep observing. this is also while keeping in mind that he has to worry about Gin.

Take your own advice kiddo.

My guy, I promise you that I am and always will be chilling lol

 

[Godernet]

Look at his fight with Kizaru,

non-canon

his fight with Kid,

friends in danger of dying, he had a much more Lax attitude about the situation until he saw what Kidd would do to his fleet via FS.

his "fight" with Greenbull,

he didn't insta GG Aramaki, bro's just a fraud that couldn't handle Shanks Haki and left.

his crew fight with Higuma the Bear.

the guy that took Luffy hostage?

He's always gone for an instant win when he can. He doesn't believe in stalling.

He's only been in situations where a loved on could get hurt when we see him like this.

Its pretty in line with how the Ace Novel describes him.

 

[Kachon123]

He's only been in situations where a loved on could get hurt when we see him like this.

Yes. When a loved one is in danger, he becomes willing to kill.

The OP states that the fighters are willing to kill, meaning Shanks' behaviors would reflect times in the series where he has been like that.

 

[LordGinSama]

ironic that they're currently in the same tier of intelligence on site lol

Not ironic at all, not all super genius characters here are made the same after all.


But I suppose you think Itachi is as skilled as Batman so there's really no use in talking to you.

 

[MonkeyOfLife]

My vote for Gin won't change.

Lol, no shit

 

[LordGinSama]

Also I really doubt Itachi can react to Beyond Advanced Buso and Hao given that his profile states this shit.


Finally, the Sharingan's predictive capabilities may partially be circumvented by fast attacks with little or no pattern, such as Naruto's chakra arms.


Much like Haki emissions.

 

[Kachon123]

such as Naruto's chakra arms.

Yup

 

[Malekith]

Yup

Haki level tree, nice

 

[Yoh_Asakura8]

Anyway... we know itachi nit holding up that susanoo for no more than less than half a day fr. He has nothing to finish shanks but probs seal but shanks sees that coming from a mile away. Genjutsu gg won't work. Fire style is a no no amaterasu maybe on gin but a no no on shanks since he's capable of resisting one piece heat scalings. Op heat scalings > nardo's.

Shanks out staminae him anyway.

 

[LordGinSama]

Haki level tree, nice

Hashirama is wood level.

 

[Godernet]

Yes. When a loved one is in danger, he becomes willing to kill.

The OP states that the fighters are willing to kill, meaning Shanks' behaviors would reflect times in the series where he has been like that.

Fair

Not ironic at all, not all super genius characters here are made the same after all.

I'm aware.

But I suppose you think Itachi is as skilled as Batman so there's really no use in talking to you.

I don't think that at all actually lol. but if you'd like to use that excuse to duck my other arguments I understand.

 

[Godernet]

Also I really doubt Itachi can react to Beyond Advanced Buso and Hao given that his profile states this shit.


Finally, the Sharingan's predictive capabilities may partially be circumvented by fast attacks with little or no pattern, such as Naruto's chakra arms.


Much like Haki emissions.

yeah, thats not what that means.

It's referring to attacks outside of muscle movement not being capable of being read by the analytical prediction of the sharingan, but he still has enhanced sight and perceptions so thats not a problem.

honestly that weakness is outdated and misleading.

 

[LordGinSama]

I don't think that at all actually lol. but if you'd like to use that excuse to duck my other arguments I understand.

I'm not ducking it but I am admittedly a goof ball who spent quite some time writing a reply then I realized I quote the wrong post from you, that you made in response to Kachon so now I need to start over lmfao

 

[Kachon123]

he still has enhanced sight and perceptions so thats not a problem.

Which is negated by BA Hao.

 

[Godernet]

Which is negated by BA Hao.

He has resistances to that like I said already. Hao isn’t doing anything

 

[Kachon123]

He has resistances to that

Proof

 

[Godernet]

Proof

Go read his profile

 

[Kachon123]

Go read his profile

?

 

[Godernet]

?

fym "?"

go read his profile if you want the proof.

 

[Kachon123]

fym "?"

go read his profile if you want the proof.

First off, calm down

Secondly, stop being a pain in the ass. I read his profile and I don't see anywhere stating that he can resist what BA Hao does.

If it does, simply quote it.

 

[LordGinSama]

You misinterpret the utility of substitution in this fight. It won't be for hiding but making distance to buy Itachi time to make multilayered plans, which are his staple.

No I understand the argument fully, I think there's some misunderstanding of why I'm arguing FS as a counter to the Jutsu. What I'm saying is that he won't have the chance to create "distance." because Shanks would see it in the future then target whatever Itachi substituted himself with.


think about it like this. Shanks uses FS to see himself attack Itachi who substitutes away. Shanks gains the information of where Itachi would substitute to and goes that direction instead.

The fact that you're still arguing that those jutsu I listed would be actual attempts to put Shanks down and not misdirections made to buy him time just shows me you don't understand how Naruto people fight lol.

No I do like I just pointed out I just think you misunderstood what I was saying lol. Perhaps I should have elaborated.

based on?

SBA and the fact that you know, he's a pirate. Shanks definitely isn't a "good dude." by any means. Plus future sight telling him the most optimal solution.

when did I ignore it? , I addressed it again in the post that it wouldn't work on Itachi due to superior resistances.

Itachi doesn't have resistance to ESP, enhanced sense, information Analysis, analytical prediction and precognition nullification.

Stop trying to make up a narrative and read the posts for once.

Take your own advice.

Go read Itachis profile then. there's a huge difference between someone who's vastly smarter than people with stated 200 iq in strategy and combat intelligence and Shanks, whose best combat-applicable intelligence lore is "two decades of combat experience". you just severely underestimate the gap here.

I agree that Itachi is certainly significantly smarter, what I'm arguing is that he isn't suddenly more skilled in close quarters combat than Shanks (Again two different types of fighters.) Sheer intelligence doesn't automatically mean your now astronomically more skilled than somebody.


For instance, would you argue that Itachi is now more skiled than the likes of Yujiro and Baki Hanma? Shen Wulong and Tokita Ohma because they aren't "super geniuses."?


Itachi can be a super genius all he wants, that doesn't automatically mean he's better than anyone with overall lower intelligence in their own aspects. Mike Tyson isn't nearly as intelligent as Itachi, that doesn't make Itachi better at boxing.

why would Itachi need to be a swordmans to be more skilled than Shanks. Please read this again and think about it while realizing Shanks has no intelligence or skill feats at all comparable to Itachi's. And if you still don't get it go read Itachi's intelligence section once or twice.

Read above.

who said anything about swordsmanship?

Because Shanks is a swordsman, not a Ninja or an assassin?¿

Combat skill isn't limited to sword techniques and the fact that it seems to be all you can come up with in reference to Shank's skill just further shows that Itachi >>>> Shanks.

Read above.

two different styles of combat doesn't mean the attributes of combat intelligence they would be using differ, Itachi had far better strategic, general, and combat IQ feats along with far better statements.

Again read above. What Shanks does excel at, Itachi isn't besting him at, I.E Swordsmanship.

I haven't downplayed Shanks. Nothing that I brought up is incorrect. he has inferior feats, no statements, no lore that would put him in the same class as Itachi.

He really doesn't. Unless you think Rick from Rick and Morty is more skilled than Mike Tyson just because he's more intelligent lol.

Prove that he is anywhere near Itachi.

Prove Itachi's Swordsmanship is on Shanks level.

If anything y'all wank some of the OP characters IQ(but that'll be for a different day)

Pot calling the kettle black.

But the point that you're missing is that Itachi is a slimy dude, he wouldn't try to match Shanks if he came flying at him, he would escape and observe until he has an understanding of Shanks.

And Shanks would foresee that via FS. Kenbunshoku makes Shanks stay 10 seconds ahead of both Itachi and Gin.

There's no argument that could be made for Shanks to oneshot Itachi before he uses one of his many escape jutsu to create distance and keep observing. this is also while keeping in mind that he has to worry about Gin.

Read above.

 

[Godernet]

First off, calm down

I’m pretty calm rn.

That comment wasn’t meant to be anything deep. Just moderate gooning from having to explain this to so many people so many times.

Sorry if it came off that way.

Secondly, stop being a pain in the ass. I read his profile and I don't see anywhere stating that he can resist what BA Hao does.

Ok give me a bit

If it does, simply quote it.

Sure.

 

[LordGinSama]

If your talking about Genjutsu sensory removal that's not the same as what BA Hao does. Genjutsu stuff is mind based, Hao has nothing to do with that.

 

[Godernet]

First off, calm down

Secondly, stop being a pain in the ass. I read his profile and I don't see anywhere stating that he can resist what BA Hao does.

If it does, simply quote it.

so I'll actually do this with a bit less gooning this time.


Hao Haki:

Haoshoku Haki works by sending out your willpower as a burst of aura to dominate the willpower of another person.

This invokes paralysis and fear in people without the resistance to deal with it.

• Fear-Inducing Aura, Status Effect Inducement, Empathic and Fear Manipulation (By directly dominating the willpower of opponents, victims often fall unconscious and are extremely shaken by this Haki, and even those who aren't are still slightly scared[63][62][1][4]. Boa Marigold and Sandersonia obeyed Luffy's command of not harming the petrified warriors[20]. Those with barely enough willpower black out for a small period of time and get mild headaches[53])

"If your Willpower is insufficient you'll be knocked unconscious. sufficient willpower will allow you to stay conscious but you will have headaches and even greater willpower will leave you unaffected by its effects."


Shanks' Beyond Advanced Conquerors Haki takes this even further by allowing him to negate the Precognition of Kenbunshoku Haki users.

• Precognition Negation (Users of this Haki can prevent an opponent from being able to predict the future[78])
• All the abilities under Kenbunshoku Haki Negation

So the main fundamental involved with how Basic Hao works is that it projects a fear-inducing Aura on its opponent that can cause paralysis, forcibly put people to sleep, etc.

And BA Hao further builds on that with added effects and greater potency.


So what does the wiki say is needed to bypass a Fear-Inducing Aura?

Depends on the type.

• Biochemical: Characters possessing this type of fear manipulation use either biological, chemical, or biochemical methods to affect their opponents. It can be resisted by many methods, including Resistance to Biological Manipulation, adequate equipment or Inorganic Physiology
• Neurological: Characters possessing this type of Fear Manipulation use Mind Manipulation and other related powers to directly influence the opponent into being afraid. It can be resisted with sufficient Resistance to Mind Manipulation
• Mystical: Characters possessing this type of Fear Manipulation use Magic and other inexplainable phenomena to exploit their opponents' fears. It can be resisted using Resistance to Magic

Hao is definitely Neurological.

This means by definition it can be resisted with sufficient resistance to Mind Manipulation.

Itachi has this even in Base:

Fear Manipulation (He became completely unfazed[70][77][78] by Obito's bloodlust-ridden aura, which had completely paralyzed him with fear[79] when he was younger. Fought both Sasuke and Orochimaru, and was unfazed by their bloodlusted[42] auras), Illusion Creation, Perception Manipulation and Mind Manipulation (Without using the Sharingan, Itachi was able to avoid[80] getting caught[81]within Obito's Genjutsu)


Meaning he's shown via feats that his Mental resistances extend as far as being capable of negating fear-inducing Auras(which is a common thing in Naruto as even Jounin have a fear-inducing aura that can drive people to want to and attempt to commit suicide.)

So all that needs to be displayed for Itachi to be unaffected by Hao is that he has better mental resistance than the potency of Shank's Hao.


Shanks' Mental Resistances vs Itachi's Mental Resistances:
Shanks > Yamato Fear Manipulation > Late WCI Luffy Fear Manipulation ~ Katakuri Fear Manipulation > Cracker Fear Aura > Dressrosa Luffy Fear Manipulation > Zoro Fear Aura

This is the scaling chain you created earlier to outline the Fear Inducing Aura of these characters as Layered.

Disregarding the fact that I find parts of the OP chain being used as Hax Layers a bit iffy, Itachi's chain of mental resistances would still go much further if we let it slide.

EMS Sasuke >~ MS Itachi > MS Sasuke > 3T Sasuke > Part 1 Kakashi ~ 3T Sharingan > 2T Sharingan > 1T Sharingan >Teen Base Itachi > Teen Obito > Kid Itachi.

this potentially goes much, much, further too.

so if you're generous to both sides it's 7 Layers for Shanks vs 11+ for Itachi. Even if you are conservative Itachi's would still be much higher.

If the fear invoked by the Haki can't "dominate" Itachi's will, then the additional effects that come as a result of the mental manipulation that Hao invokes wouldn't matter.

 

[Guacamolefletcher]

You do realize other series use this artistic style as well right? And it’s sometimes just used to show when a character squints often or doesn’t fully open their eyes(sometimes to show a character is laidback or very calm) Given that nothing is directly stating this to be the case other wise I don’t see why you believe one assumption is more concrete than the other with little evidence to support the claim.

nah, in bleach we just see he got his eyes closed. The only thing that kinda shows it's different is some anime filler

 

[LordGinSama]

So the main thing involved with Hao is that it projects a fear-inducing Aura on its opponent that can cause paralysis and forcibly put people to sleep.

That's not how BA Hao works? Kenbunshoku Haki users can already fight while unconscious.

 

[Godernet]

Also would like to bring up because I forgot that one of the Genjutsu's that Itachi does use in character, Ephemeral does work without eye contact.

• Illusion Creation and Fear Manipulation (With Ephemeral, Itachi can cause his target to see horrific visions of their worst fears and insecurities[58]. Additionally, this technique does not require eye contact)

He literally points his finger at you and you're in an illusion if you look at the finger.

 

[Godernet]

That's not how BA Hao works?

BA Hao is just juiced Hao. It works under the same conditions of fear manipulation but has far more potency and an added effect.

That's even whats described on the Haki page I pulled from.

If you have some extra evidence that contradicts it please present it instead of just saying I'm wrong.

Kenbunshoku Haki users can already fight while unconscious.

not at all relevant to anything I said.

 

[LordGinSama]

If you have some extra evidence that contradicts it please present it instead of just saying I'm wrong.

It's late as shit and I'm already gone so I'll have KT or Em give an explanation of how Hao Kenbunshoku negation works.

not at all relevant to anything I said.

It absolutely is, they can already function while asleep putting them under sleep doesn't work for that very reason.

 

[Godernet]

It's late as shit and I'm already gone so I'll have KT or Em give an explanation of how Hao Kenbunshoku negation works.

I know how it works.

It absolutely is, they can already function while asleep putting them under sleep doesn't work for that very reason.

think for a second. when did I ever say anyone was going to put anyone to sleep?

That sentence was just me giving a general summary of what Basic Hao does to normal people.

"So the main thing involved with Hao is that it projects a fear-inducing Aura on its opponent that can cause paralysis and forcibly put people to sleep."

It can knock people unconscious. thats all I said.

 

[Sasukesolos]

Im going with itachi he has higher combat intelligence, analytical abilities

Itachi can clone himself, easily creates an advantage in numbers while also being deceptive.
He can easily use his crows as a medium to create copies of himself. which, can also be used to cast illusions and just completely mind manipulate both shanks and gin.

• what’s stopping itachi from just pointing at gin to manipulate his mind? Assuming gin’s eyes are completely shut, incapable of visual perception. The “ finger Genjutsu” isn’t reliant on visual perception.

Regarding Gin’s eyes being completely closed I don’t agree with this interpretation because he can easily just be squinting his eyes which is a common trope.

 

[EldemadeDityjon]

• what’s stopping itachi from just pointing at gin to manipulate his mind? Assuming gin’s eyes are completely shut, incapable of visual perception. The “ finger Genjutsu” isn’t reliant on visual perception.

Regarding Gin’s eyes being completely closed I don’t agree with this interpretation because he can easily just be squinting his eyes which is a common trope.

Show me normal Genjustu working on souls

Also already explained numerous times. Soul Reapers are train to fight even without opening their eyes. Additionally Gin was completely Vary of Aizen abilities if you think he would open his eyes and fall for stupid Genjustu it's out of character thing for Gin.

Not to mention last time I watched Naruto character should watch at Itachi finger to put into Genjustu mind showing where it was stated you don't need to watch Itachi finger

Also Izanami is a technique used against one individual at a time if i am correct. Idk why Itachi would use it gin specifically. There is also Shanks fighting in there. And Itachi needs time to activate the technique.

 

[Godernet]

Show me normal Genjustu working on souls

I feel like this has been explained to you 15 times at this point. But Sasuke, Itachi, and Kabuto have all shown the ability to genjutsu Edo Tenseis.

the only genjutsu in the series that has that weakness is IT.

Also already explained numerous times. Soul Reapers are train to fight even without opening their eyes.

Soul reapers have this training ofc but stop acting like it’s completely in character for Soul reapers to walk around fighting with their eyes closed as if they would know what Itachis ability is and how to counter it as soon as the fight starts

saying that Gin would just know to keep his eyes shut is headcanon.

you would need to prove it’s in character for Gin to close his eyes in combat against someone he’s never met.

Additionally Gin was completely Vary of Aizen abilities if you think he would open his eyes and fall for stupid Genjustu it's out of character thing for Gin.

What would be out of character is to know he’s fighting an illusions user and keep his eyes shut as if he knows the person he’s fighting’s arsenal.

Not to mention last time I watched Naruto character should watch at Itachi finger to put into Genjustu mind showing where it was stated you don't need to watch Itachi finger

Ephemeral works by him just pointing at you. And you looking at the finger.

Also Izanami is a technique used against one individual at a time if i am correct. Idk why Itachi would use it gin specifically.

Itachi is capable of reading a person personality and motivations with extreme accuracy.

he’s been able to figure out a persons fears and motives with very minimal contact or knowledge of the person at all, practically just meeting him for the first time.

this isn’t even to mention the sharingan ability to read a persons memories.

he could easily figure out if Izanami would be effective against Gin. Tho I do think he would opt into Tsukuyomi first.

There is also Shanks fighting in there. And Itachi needs time to activate the technique.

He can make time for himself with clones, substitution, shuishin, AOE, Susanoo, and all his other abilities.