My biggest question about healing is, if you cast off a heal before the damage from a creature hits the reciever, the heal should go off first. I've noticed that even when I'm healing, the damage from the creature seems to go off first even if I casted first. Heals are slow upon hitting the reciever, you have to wait for the health bar to fill up which gives the creatures damage a chance to hit beforehand. Heals should fill instantainiously upon hitting the reciever. This might help with cutting down the amount of times it takes to res everyone.