The late game fights are so huge of a jump in difficulty that beating them takes far too many rounds of combat and tons of uses of stimulants just to get through. I think some balancing is definitely needed, such as with the Clauria fight. It's Kiva and Purnima going down the most, I've had to go through one shark fight taking almost every single round just reviving one of them, sometimes with one of them still being down since I can only revive once at a time with Namu.