They were only 7-B when they were far away from Nagato, but he will make sure to keep all of the Pains nearby to ensure they're at their strongest, that's my point.
Did they become stronger when they fought in the crater? Naruto, who Itachi's stronger then, still one shot them, most of them with just basic attacks.
https://media.**********.net/attachments/972158760229417000/1068240253128822844/PA_SM_Naruto_Pain_feats_collage.jpg?width=1066&height=580
What proof is there that he can easily overpower the Paths? Even three of the Paths together were enough to make SM Jiraiya admit they'd kill him, forcing him to resort to genjutsu to trap them. You're severely underestimating their coordination skills and ability to help one another and overestimating Itachi's ability to counter six opponents with comparable power all at once. Even Itachi's skills wouldn't be enough to withstand their combined assault.
Because Susanoo>>Itachi>MS Sasuke~SM Naruto>Paths. And they have comparable power yes, but comparable weak power to a Susanoo. The Susanoo is pretty well suited to taking on multiple opponents at once with its all encompassing armor and wide sweeping attacks.
He can use the Asura Path to fire multiple missiles or energy blasts from afar, and the Deva Path can use his Shinra Tensei or even Chaotic Shinra Tensei. As I said, he could also just take evasive maneuvers or wait for Itachi's stamina to run out, since he can't
Random missles and energy blasts aren't powering through an Armored Susanoo. CST requires the other Paths going down and a pretty lengthy build up, during which Itachi could easily interrupt. And he's not gonna be able to keep away, as the Susanoo is super fast compared to its user.
If someone can latch onto the user, then they can be pulled out of the Susanoo. So if Nagato used a summons, like the chameleon summon to turn invisible, the chameleon could grab Itachi and pull him out, as another example.
??? You know that the fact that it's invisible doesn't mean it's intangible right? It's tongue isn't gonna pierce the Susanoo.
During their battle, he used his Deva Path to stop a Rasenshuriken, then replicated the feat even after having just used his Chibaku Tensei. Again, keep in mind that most of the feats done by Pain during Konaha were after he'd just used his Chaotic Shinra Tensei and when his bodies were farther away, meaning his power should be greater than what he displayed back then.
I don't even know if Nagato was closer to the Pains in the Rain Village than when he was in the Leaf Village. In both cases he was in a high area close to the battle.
This was a casual Shinra Tensei and also done with a weaker Deva Path who'd just used Shinra Tensei and was much farther away from Nagato's body, and despite that the Pains could still keep SM Naruto in a lock.
Ok since the problem seems to be that you think Pain was much stronger in the RV even though there's really no evidence of that (Pain did better against SM Jiraiya than he did against SM Naruto, and Naruto>Jiraiya), I'm just gonna say he's as close to Pain as he was in the Leaf Village.
And Pain will just absorb the ninjutsu the way he does with most attacks. The Human Path could also just steal his soul, get Itachi in a grip-lock the way he did with SM Naruto and rip his soul out. He has so many more options and powers than Itachi does, and the Mangekyo Sharingan significantly limits his stamina.
Preta seems to only be able to absorb ninjutsu through his hands, so Itachi could attack from the back or like I said before, use something else when he realizes ninjutsu isn't working. The Human Path is NEVER locking someone as slippery as Itachi. And is there even any evidence that The Human Path scales to The Preta Path?
Not if he has to keep spamming his MS abilities just to keep up with the Pains, which will eventually force him to deactivate the MS altogether, leaving him extremely vulnerable.
Will only really need to against a few of the Paths tbh.
Just THREE USES of his Mangekyo Sharingan left him exhausted, and that means he can't keep it up for very long. Meanwhile, even if Itachi manages to take down some of the Pains, the Naraka Path will just restore them and resume their coordinated attack. Itachi can't overcome this, and Pain is constantly being downplayed.
Against Sasuke, Itachi was able to use Tsukuyomi, Amaterasu twice (enough that it spread across the entire Uchiha hideout), and Susanoo for a few minutes, keeping the MS activated the whole battle which already drains a lot of stamina on its own, and this at his worst condition. He can most certainly use the MS more than a few times.
https://media.**********.net/attachments/1012497132063834143/1068249186853732424/10-afKtPHVYlhGPk.jpg?width=980&height=581
Itachi might kill the Naraka Path in his assault, but even if he doesn't, as soon as he sees that it arrived one of them, he's gonna focus on taking him down, just like Naruto did, and Itachi's definitely smarter than Naruto, on top of being a superior combatant in general, so he could certainly pull it off.
Again, even if Itachi does manage to defeat the rest of the Pains, which is very possible, Nagato will simply use the Chibaku Tensei, which Itachi has no way to prevent. He doesn't have the power necessary to stop the attack or survive it, even with the Susanoo. And since Nagato knows how powerful Itachi is, he may very well choose to resort to it sooner in the fight.
"And while Pain's summoning Chibaku Tensei, Itachi could probably just stab him, making it a draw at worst, or stab the core of the CT."
And why is speed equalized? Their speed is relative: Itachi's profile has "possibly Sub-Relativistic", which means it doesn't have to be used, so just use Massively Hypersonic+ instead.
Like I said before, the speed section of his profile is all messed up, cause it should be P1 and P2, but instead it's ordered as Sick and Healthy, and Healthy Itachi was removed because he's theoretical, and there's no proof he's ~/>Edo Itachi as he could've been getting stronger through training while the sickness nerfed him, meaning Healthy Itachi is<Edo Itachi despite the Edo nerf.