Personally what I do in situation where 2 melees take damage is just use Regen on them. If I know they shouldn't be getting hit again anytime soon (unavoidable damage) then Regen should be good enough. I rarely find use for Cure III only because in a PUG people have a habit of not stacking much outside things like Titan and Shiva. My most used AoE spell is Medica II.
Side note: Was everyone like me? Didn't want to be the first one to post and was waiting for someone else to post first? lol Good thing I posted first then. :P