Not sure if this has been posted before but one spell that White Mages enjoyed in FFXI was Reraise. It gave you the ability to auto-revive mid combat without having to return to the starting point of the zone. You were still weakened, subsequent levels of Reraise reduced the weakness from memory, but it gave the player the ability to salvage a potential wipe.

I don't propose the ability is usable by everyone, maybe limit it to healer archetypes as a cross class ability but I feel it's a tool the healer role is currently sadly lacking.