[Ranylyn]

Some of them add up, but most don't. For example, Cracked Mirror and Absorb Ether? They stack. Capacity and Witch Hat? Nope. It's been awhile since I've played an HP regen stacker simply since most HP regen effects are utter garbage right now, with the exception of Glykins, but they have similar issues with numerous messages at the start of a new round.

I'm not joking when I say that at the start of a new round, even in a 3 person party, it's not uncommon to see 10 or more HP/FP recovery messages. If it added up, there'd be 6 total, assuming everyone has both an HP regen and an FP regen. I've had one character get like 7 messages on their own, before.