[EbeneezerAl]

Whenever they change, it's random. Anytime you see a couple of them flash like they're acting, but no action is taken, their weakness have ALL changed. Not just th two who flashed, all of them. I think all the damage is cumulative though. You don't have to kill them all, just one of them. I suggest finding the pysical one and save your MP for healing and support spells. Just keep going around hitting a different target with each character till you land the hit. It usually swaps as soon as it's found, so you likely won't get a second hit. I suggest using a Monk or a Ninja here for the double attacks. Particularly the ninja. Either using the Dancing Dirk to get Sword Dance (a major amount of damage if it hits) or using a double lance to get three attacks off in one shot (assuming you have either of these).