BTW All the way back to AD&D it was well established that Divine magic was good at differentiating and being ally friendly and wizard magic rather wasnt... it was an implicit characterization difference.By itself, any mechanic that lets AoEs be picky about friend or foe invites all sorts of questioning (I do it in an area with my team, the bad guys, and innocent folks.... how does the attack figure that out when the characters can't even figure out who is who sometimes?). 'It's magic!' isn't a solution. It's a cop out. And going with that without a decent explanation simply leaves players not knowing how magic works because it obviously has a certain omniscience but then other powers show almost the opposite... so where's the consistency?