I've gone over the thread a few times, and I agree on the Doppo scaling. There is no evidence that Doppo permanently lost any of his strength after recovering. I think the split between a "Prime" and "Post-Fight Key" makes no sense. The most difficult thing is that the author seems to have ramped up the unrealistic elements overtime. Looking at the fight between them he was on the Yujiro's level, and it wasn't just technique. Maybe you could argue
this is from technique, but even his strikes could
draw blood from Yujiro. The way things are now most characters would have some way to scale from Yujiro.
However, I sorta disagree with discarding Town level outright. There are such a large number of statements, that I don't know if it makes sense to remove 7-C altogether. You can dismiss some of the statements as clearly flowery like the
FTL and Yujiro's strength increasing faster than the universe expanding, but there is clear cut information given comparing the highest chars to nuclear weapons. So, it doesn't make sense to immediately dismiss them from a gut reaction. Plus, there is a huge variety in nuclear yields, even "low yield" nukes are still 7-C.
Like I said 99% of the cast clearly shouldn't be 7-C in my opinion.
There are a few different ways we can handle this.
Option 1: Treat the Earthquake feat as an outlier
Option 2: Limit the scaling between the cast and Yujiro unless they have statements that put them among the God Tiers
Option 3: Allow the characters to scale from the Earthquake calc, which would make all of the 9-A characters 7-C. I think that doesn't really make sense.
We still have ways to scale the cast if we take option 2. My personal suggestion is keeping
9-A for the Convicts Arc,
8-C for Baki before he starts his imagination training, and
8-B from Baki's imagination training but before Yujiro acknowledges his strength during their fight.