weapon animations and constant spell effects

ADDITIONALLY! If you DO try to give someone Regen via events (like Shadow's Interceptor status), then either you'll have to apply it every time a major event occurs (because most events auto-matically remove all statuses except Interceptor), or you'll have to edit the code that heals all status effects so that it never removes Regen from any character. (There are actually a few different places where this occurs apart from the main command, so you'll need to be really thorough with the event dump if you go this route.)

Djinn's right on that one, I forgot about that...all status effects (except magitek and interceptor) are removed during every event. Even going to the inn to sleep is considered as an event, and regen will be removed.