Damn, those rapid punches do tons of damage even when scaled huh?
It should be 4 damage per hit since it can't go any lower. So without even mashing, you already get 20 damage very quickly. With mashing, it should do almost as much as his qcbx2 P super which is really good.
Kensou's Neo Max is even one of the most damaging Neo Maxes in the game fully scaled going for 284 damage. Most people (including me) seem to underestimate Kensou's damage.