Base Naruto needs a change. 7-B+ is maaaaassive downplay. He
clashed with Base FKS Sasuke (485/486), who at this point is more than 10x stronger than Base Hebi Sasuke since 3T FKS Sasuke>CM2 Hebi Sasuke. Even Base Taka Sasuke is low end relative to 3T Taka Sasuke who's Mountain level, as he
blocked a sword swing from Bee who's >3T Taka Sasuke then briefly fended Bee with his 7 blades off before being forced to activate the Sharingan (411). Base Taka Sasuke should be City level+, and thus Base Hebi Sasuke should be too, which is consistent as
he blew Sai and his jutsu away just by flexing (306). That means Base FKS Sasuke scales more than 10x above 53.15 megatons, or 531.5 megatons, and would be At least Mountain level (really close to Mountain level+ so he could upscale there, but that's more debatable so I'll be conservative), and so would Base Naruto by extension. This also affects WA Sasuke, but he's gonna be in the next section because of a change to Edo Itachi that'll affect him. And this is sorta a side point, but CM2 Sasuke's AP section should include the fact that he's >3T Naruto, as
Orochimaru states as much and the databook implies it as well.
The upgrade for SM Naruto is as simple as they come. Naruto's normal AP is currently rated as Large Mountain level, and the databook states that when using Rasengan Barrage,
his power more than doubles (DB4, pg. 307). Since SM Naruto>SM Jiraiya>>Base Jiraiya~Orochimaru>Hebi Sasuke~1.4 Gigatons, this means that the Rasengan Barrage would scale >2.8 Gigatons, which is Large Mountain level+. And ofc, Rasenshuriken is stronger than that and is an exponential amp from Rasengan, so the same applies.
KM6 Naruto is a little weird cause his Bijuudama (and even physicals tbh) should logically be stronger than SM Naruto's Rasengan Barrage but idt there's a quantifiable way to prove it (best I can think of is KCM Naruto thinking to use a Bijuudama against 3A after the Rasenshuriken fails, but it's kinda vague). Similar question applies to KCM Naruto and those who scale to him. Personally I'd say they should be High 7-A+ but I'm fine with not doing that if staff disagree and think it's too large an assumption. I put a conservative estimate of his power below.
Also, MS Sasuke should be High 7-A+ with Susanoo, because if he's equal to SM Naruto, he needs to be able to deal with his stronger attacks, not just his taijutsu and Rasengan. Pain's AP justification should remove dissipating the RS as it's not really an AP feat as I explained much earlier, and I made some minor clean up revisions to his existing justification. And his CT/8T Naruto should be likely 6-C+, as Naruto only saw Pain's CT before, and
thought that Bee/Susanoo Itachi would never be able to get out, and implied 8T Naruto>them (551).
At least
Mountain level (Much stronger than before due to his training at Mount Myōboku.
Clashed with
Base FKS Sasuke),
Large Mountain level with Sage Mode (
Much stronger than his base form. Stated to have
surpassed his predecessor,
Jiraiya[30].
Consistently destroyed Pain's bodies when all or most of them were active
[31][32][33][34]. Pain stated that
Naruto had pushed him farther than ever before, which should put him above Sage Jiraiya
[35]. Comparable to
Mangekyō Sharingan Sasuke, as they both
saw a vision[36] of their mutual deaths[37] if they fought, and believed they needed
the Nine-Tails’ chakra and Itachi’s eyes, respectively, to defeat each other
[38][37][39]),
Large Mountain level+ with Rasengan Barrage and Rasenshuriken (Rasengan Barrage
increases the Rasengan's power more than twice. His Rasenshuriken is
this strong), At least
Large Mountain level with KN6 (Stronger than before.
He was able to overpower Pain's Shinra Tensei. His Bijū Bomb is
this strong), At least
Island level with KN8 (Much stronger than before. Completely broke out of
Pain’s Chibaku Tensei), likely
Island level+ (
KCM Naruto thought that if he,
Edo Itachi, and
Killer Bee got trapped in it,
they'd never get out of Chibaku Tensei, and considered the Nine Tails rampaging as the only way to break free)
City level+ (
Casually overpowered Sai),
Mountain level with Sharingan (
Physically clashed with
Itachi Uchiha, who was using the Mangekyō Sharingan, after matching his shurikenjutsu
[128]),
higher with CS1 (At least one-tenth as powerful as his CS2 state),
even higher with Partial Transformation (Can
partially transform into CS2 to enhance his strength
[129]),
Large Mountain level with CS2 (
Created the thundercloud that spawned Kirin with his
Great Dragon Fire Jutsu[130].
Much stronger than KN3 Naruto),
Island level with Kirin
[130]
City level+ (
Blocked a sword swing from
Killer B and momentarily fended his Acrobat assault off. Shouldn’t be much weaker than his Hebi self, as he had only
lost the use of the Curse Mark and wasn’t fully healed from his fight with Itachi
[131]),
Mountain level with Sharingan,
higher with Mangekyō Sharingan (The Mangekyō Sharingan greatly enhances its user's capabilities)
At least
Mountain level,
Large Mountain level with Sharingan (
Karin stated that his chakra was
thicker and colder than it was in his CS2 state
[132]),
higher with Chidori (
Pierced through
V1 A’s Raiton Armor and drew blood from him
[133]) or Mangekyō Sharingan (The Mangekyō Sharingan greatly enhances its user's capabilities. Comparable to
Sage Mode Naruto, as they both
saw a vision[134] of their mutual deaths[135] if they fought, and believed they needed
Itachi’s eyes and the Nine-Tails’ chakra, respectively, to defeat each other
[136][135][137]), likely
Large Mountain level+ with Susano’o (The Susano’o greatly increases Sasuke’s strength. Should be comparable to Sage Mode Naruto's stronger attacks)
City level+ (Even with 6 bodies active and being far away from Nagato, Pain can easily overpower
Kakashi,
Chōza, and Choji with his Shinra Tensei) to
Large Mountain level (His
Rain Tiger at Will technique is this powerful, and he can easily maintain it for long periods of time over Amegakure without draining himself. With less bodies active,
he was able to trade blows[41] with
Base Naruto, even though he wasn't at full capacity yet.
Casually caught a punch from
Sage Mode Jiraiya[40]. Jiraiya
admitted that the three Pains he was facing could kill him if he fought them simultaneously.
[52] The Animal Path could
stab and wound Jiraiya.
[53] He easily sent Sage Mode Naruto and his clone flying, which caused the clone to disperse and the original to groan in pain, with a casual Shinra Tensei
[45]),
far higher with Chaotic Shinra Tensei (
When Nagato focuses his power on the Deva Path, his Shinra Tensei is dramatically enhanced[35]), At least
Island level with
Chibaku Tensei, likely
Island level+ (
KCM Naruto thought that if he,
Edo Itachi, and
Killer Bee got trapped in it,
they'd never get out of Chibaku Tensei, and considered the Nine Tails rampaging as the only way to break free)