Considering from what I've heard about the difficulty spike requiring multiple lvl 99 senki to just pass at endgame lvl, if they're insistent on keeping the gacha the same, then the difficulty is gonna have to be adjusted for balance purposes, else free players that are unable to get 6*s due to luck or whatever are gonna be destroyed on those lvl99 requirement lvls.

Heh, maybe the stamina regen rate should be reduced to 1 per minute like x-overd to make the grind possible or something.