I think its best to divide them using stuff like, certain milestones more than arcs? Like the introduction of masteries/kings, then paths, etc
Where do you guys want me to start? Cuz there is technically some minor power creep during the first few dozen chapters with the Gian high school that already establishes J high as being freakishly strong even when lookism wasn't super human (speaking of why was Gian high school in particular a reoccurring villain for so many arcs lmao)
We had the dude with glasses that abused his GF that Zack used as a punching bag (he is also the 'hots! Hots!' guy that spoke to the 3 upper class men from Gian that wanted to jump Zack after they saw him crying while drunk before they got beat up by him at the library and him beating them up became a running gag lol)
And then we finally have the trio of dorks that scammed people online using shoes and their leader that was an amateur boxer like Zack, we were shown that each of them could take out a Judoka that were shown to be both pretty tall, and weight a lot/muscle mass AND knew judo, and Zack pretty much slimed them out by himself including one shooting their leader the same way Daniel one shot him by punching him in the stomach lol
So we have Yong Lee < his upper class men(Yong Lee felt confident that his 3 upper class men could beat Zack after loosing to Zack) < Judoka (because of their build and knowing Judo) < Woojin's underlings < Woojin (stated he is the strongest among the trio and is also the top dog at his high school) ~ BOS Zack (they should scale around the same as Woojin was able to take out Zack with surpise jabs but Zack also able to keep up while injured and one shot him by targeting his stomach the way Daniel did)
There is also that gangster dude with a bat who is apparently from Syheon's school, he is from the call out arc though he is fodder as Zack with broken(?) arms basically low diffed him lol
I know this all probably doesn't sound relevant but it could tie into questism scaling as that boxer guy Zack beat was the top dog at Gian school if that means anything or has any scaling implication, as I know questism has some earlier series calcs with Syheon breaking a closet door that we can maybe use for BOS J high?
Could technically scale BOS J high to one of these 3 calcs or slightly lower/higher
I think at least the first one might be applicable as while Syheon DID use maximum capacity (meaning he weight 160 something pounds) his strenght and speed was still at E rank and at most with thr card it should maybe be S rank/S+, I feel like you could make an argument for BOS J high at least partially scaling to it imo
I'll get to the actual relevant stuff tomorrow since its late, this is kind of just an example, any suggestions to what I can add to the chain scale are welcome! Good night guys :3