Grandia II is the only JRPG I've ever really truly enjoyed the battle system of. I feel like with a lot of JRPG's I'm sitting around doing math.

Grandia 2 was largely just timing things such that if you did it right you would bonk the enemies turn back repeatedly and they'd never get to attack. Way more fun.

The very first area at the start of the game actually encouraged this if you experimented even a little: Combo is the default attack but it doesn't defeat those early enemies so they'll hit you back, but the battles start with just the right timing so if you use Critical first it'll knock them back so your next Combo would hit and defeat them without you taking any damage.