Well since Morris and me have 2 different versions of it I'll just point out both.
@MorrisHatesYou version (basically what he wrote in the OP):
This is how the scaling chain goes:
Mikey=Izana> South> Kakucho> Takemichi (final arc)> Senju > Angry> Taiju>= Mucho> Wakasa=Benkei> Inui=Koko> Draken> Hanma> Osanai> Mid tiers (Chifuyu, Baji, Ryusei, Kazutora, Mitsuya, Hakkai, Peh Yan, Pah Chin, Smiley, Ran, Rindou, Sanzu, Mochi> Low tiers (Takemichi [before final arc], Kisaki, Akkun, Makoto, Takuya, Yamagishi, Shion, Kojiro).
Reasoning:
Mikey's position is self explanatory.
Izana was able to dominate Mikey in Tenjiku fight even when Mikey was going all out.
South is 3rd because he defeated characters like
Kakucho and
Senju, and only lost to Mikey, the reason why Izana is higher because
South got defeated with low difficulty by Mikey, while Mikey had much harder time against Izana.
Mucho defeated Inui with low difficulty,
Wakasa and Benkei defeated Inui and Koko with high difficulty. So this makes Mucho scale above Wakasa and Benkei.
The reason why Inui and Koko scales higher than Draken is because
Wakasa fought Base South a lot
better than Draken did, and Inui and Koko are only slightly weaker than Wakasa and Benkei.
Draken scales above Hanma because he defeated Hanma, however it is with a high difficulty.
Osanai defeated Pah Chin, who's a mid tier, with a low difficulty, so by default, Osanai scales above all mid tiers.
Scaling Taiju is a bit hard, but we can know that he defeated Inui with low difficulty, same as Mucho.
Angry scales above Taiju because
Taiju had problem fighting against Wakasa and Benkei although he defeated them, while
Angry was capable of defeating Mucho with a low difficulty, who should be A LOT stronger than Wakasa or Benkei. But we don't really know how Mucho would deal with both of them. So Taiju and Mucho would be pretty relative, but it doesn't hurt to place Taiju higher than Mucho since he has better narrative.
Kakucho scales above Angry because he defeated Angry with low difficulty.
Takemichi in the final arc
is relative to Kakucho, but I placed Kakucho higher since he was much more physically active during Tenjiku arc than in final arc.
The hardest part is deciding where Senju scales since only her notable serious fight is against South.
We'd have to use Kakucho as a base for the scaling of Senju.
Kakucho in the final arc was supposed to get KO'D by Takemichi (since Takemichi's full power was revealed), but then
after Mikey mentioned about Izana, Kakucho got back his fighting spirit and
he went comparable to Takemichi.
So we have two different versions of Kakucho, the one without fighting spirit who was depressed because of Izana's death and the one with fighting spirit, the difference between these two Kakucho(s) is very high since like I said, the Kakucho with fighting spirit can (who was comparable to Takemichi) can KO Kakucho without fighting spirit in a single hit.
The Kakucho without the fighting spirit is already absurdly strong, because in the flashbacks he was able to push South to his dark urges, and when Senju knocked south down,
South said that it's been a while since he's that fired up, he should be directly referencing the fight he had with Kakucho since he tend to recruit the stronger members to his gang, here he recruited the S-62 generation and Kakucho.
Also when the legendary duo got upper hand against South,
South looked down on them, but
when Kakucho was knocked out by Mikey, he was very surprised.
South with urges has three different versions, the first one is when he was against the legendary duo, the second is stronger and it is when he fought Senju, the third one is the strongest, and that was against Mikey.
The South Kakucho fought is in between the first and second version, with second version being closer.
So based on this, Kakucho with fighting spirit can KO the Kakucho who is near South second urge version and Senju. So Kakucho with fighting spirit will scale above Senju.
So, only Izana and Mikey should scale to feats done by them.
South, Kakucho, Takemichi, Senju and Angry should be in the same vaccum.
Taiju and Mucho should scale similarly.
Wakasa, Benkei, Inui and Koko should also scale to one another.
Same with Draken and Hanma.
Osanai should be above mid tiers, but lower than Draken and Hanma.
All mid tiers should scale to one another.
Low tiers are characters who can get KO'D by mid tiers with a single strike, their scaling is not that consistent, they're just slightly stronger than average delinquents.
@Zefra3011 version:
Talking in terms of stats and not overall who is stronger, Izana scaling to Base Mikey is completely fine, but there are a lot of characters who actually simply downscale to him too Hanma is the first one who downscales from base Mikey since
he was able to block his kick due to his extraordinary vision/reaction
and showed comparability with him,
he got no diffed by DI Mikey tho, so we have Base Mikey >= Hanma while DI Mikey > Hanma (DI is considered a stats amp so Mikey DI > Base Mikey), Draken scales to Hanma as you pointed out, so we have Hanma = Draken,
Base South also scales above Draken so we have Base South >= Draken which is also justified by a
statment which puts South on pair with Mikey, both
Wakasa and Benkei should scale to Base South since they could more less fight him while doing 2v1 but they showed to be able to handle him even in 1v1 situations, when South went DI/DU (if you prefer you can call them dark impulses as Mikey or Dark urges)
he could no diff them both but
when DI Mikey faced DI South Mikey won,
Senju full potential scales higher than Base South since she can no diff him but
she barely kept up with DI South, Base Senju doesn't have great feats but
she was able to beat 100 guys by her own which is a similar feat performed by
Draken when he could beat the entire Black Dragons by his own (100 members) and he took some damage while Senju didn't so they should be comparable even because captains aren't able to beat 100 guys by their own so at bare minimum she upscales from captains, Kakucho also should downscale from Izana since
Izana was afraid he could become stronger than him so he put a rule saying Izana's punches can't be avoided and he is superior to Angry as you pointed out which makes him > Captain level,
Takemichi with Resolution also scales to Kakucho since they showed relativity in the final arc, while Base Takemichi is weak so he goes down to low tiers.
One of the main differences between the 2 chains is that Wakasa and Benkei are relative to Inui and Koko while in my chain I explained why I don't think they are:
First we have Inui and Wakasa in 1v1 when we can see an enormus difference in damage,
also Benkei said the Wakasa Inui fought was "soft" which basically means he wasn't going all out,
here is implied Wakasa and Benkei were regretting joining the Kanto Manji Gang because they still had the Black Dragon first gen spirit which is completely different from the Kanto Manji Gang spirit so they probably weren't totally ok in fighting that way even because they were against Inui who also is a first gen like them, another reason Wakasa and Benkei weren't going all out is because when they fight they always coordinate their attacks this way:
wakasa goes first attcking the opponent without dealing much damage but using his acrobatics skills he is able to stun him while Benkei just go bulldozing the opponent after Wakasa did his job but here
they didn't fight their usual way since they just attacked randomly,
another factor is the amount of damage which is clearly different, so a soft Wakasa with a probably soft Benkei (even if he said he wasn't soft he didn't really show that) who didn't really want to fight while fighting randomly are still incredibly superior than Inui e Koko, just to add reasons
when Wakasa and Benkei faced Taiju they instead used their normal way of fighting and Taiju is stronger than Inui and Koko and didn't share the first gen spirit so we have a clear difference in a full power Wakasa and Benkei and the ones Inui and Koko fought, last thing if Inui and Koko were truly comprable to Wakasa and Benkei they should be able to handle Base South but
Inui clearly couldn't since when they introduced South we see a post fight Inui vs Base South and Inui was no diffed, therefore is better to keep Inui and Koko just Captains level.
Taiju isn't superior to Wakasa and Benkei since is implied the reason he won is
because they were tired while when they weren't much tired
they were no diffing him, and if he was relative to them he would be on the same level as Base Mikey but
Taiju got no diffed by him so he is no where near that level.
Another characters who is usually downplaied is Sanzu
who in fact fight on pair with Kakucho, tho he is able to keep up with him mainly because his katana which in fact "increase his combat speed", is not literally but since he is using a long weapon the speed it is moving is higher than the one Sanzu does, this happens IRL too, so without it he should be just captain level.
Captains are all more less comparable, 100% and 70%
Taiju who scales above Mitsuya should therefore scale above all the captains but still isn't no where near Base Mikey level as explained above, Mucho auto
proclamated himself the strongest captain which I wouldn't say is very reliable sincewe have to take in account that he isn't aware of other captains strenght as we can see when he fought Angry (who is a vice-captain),
Mucho wasn't aware about his full potential and lost to him so ignoring this statment and putting Angry and Sanzu above him is completely fine imo, Mucho also was able to beat Inui so he scales above him, I'll list everyone who scales around Captain Level below.
Another point is that takemichi is only able to keep up with a non 100% DI Mikey thx his future visions which allow him to dodge Mikey's attacks and was able to land an hit on him just because
he could find the right moment when Mikey couldn't dodge it because he was finishing his kick but normally it would be impossible for him also because that
Mikey was no diffing him and
a 100% DI Mikey killed him in some attacks.
So we have:
The Strongest:
- DI Mikey as top 1 with DI South and FP Senju downscaling from him (they upscales from their base versions and from their feats in this versions)
- Base Mikey, Base South, Izana, Wakasa and Benkei share the same scaling with Draken, Hanma, Kakucho,Takemichi with Resolution, Base Senju and Sanzu with a katana downscaling from them. (They upscale from Captains level feats + their own feats)
Captains Level (They scale higher than Below Captain Level feats and also scale from their own feats):
Taiju and Angry are the strongest here so they upscale from captains feat, every captain and vice-captain from Toman, Osanai, Rin, Ran, Inui, Koko Mocchi, Ryusei and Kojiro (Kojiro alone just downscale from captains) (hope I didn't forget anyone) are all around the same level.
Below Captain Level (They scale from their own feats):
Takemichi without resolution, Kisaki, Kyomasa, Shion, Akkun and Sinichiro (these are generally treated as weak characters so they don't have incredible feats therefore they only scale from low tier feats as they are all more less relative between them)
Another thing why I think mine is better is that Morris chain contradicts the profiles, as the profiles have Mikey and South with stats amp or at least a berserk mode with their Dark Impulses which mean while they are in this state they are stronger than their base form, Morris one doesn't take in account that because he doesn't think Dark Impulses make you stronger and he thinks Mikey simply has Accelerated development and that's why he first couldn't do much against Hanma but after (when he was in Dark Impulses)
he could one shot him and I want to point out in the first fight Mikey never become stronger but he kept his stats the same while Morris and Arnold said he grews stronger during the fights
which does against takemichi (here we have a Dark Impulses Mikey and reactive power is already under Dark Impulses in his profile)
while against Hanma he didn't become faster even if one of his friends was basically dying so by logic he wanted to end the fight as soon as possible (here we have a Base Mikey), also South went from being on pair with Wakasa and Benkei to no diffing them as soon as his Dark Impulses (or Dark Urges) activated (the scans are above) and MIkey's Dark Impulses if anything should be even stronger than South's ones.