2) Casting Medicas when only one or two people really need healing, to the point their go to reaction seems to be Medica II > Cure II. ??? It's such a waste of mana and drives me insane. It doesn't even grant enough HP for the people that you're doing it for.
Depends on a lot on the situation, what I'm placing more value on (Time vs. Mana), how badly damaged the players are, whether more group damage is likely to come out soon, and whether or not I'm trying to DPS.