I dont know if you realise that this is a very bad idea. But yeah it's a very bad idea. if Healing was based off of DPS output there'd be so many deaths the game would become unplayable. See the issue theres already more than enough healers that overcast damage and dont heal enough to even keep the tank alive. Think how much worse it would be if those healers that actually heal were now dependent entirely on damage making thier healing more potent. there'd be even less healing happening when it needed to happen and the queue time would go up because nobody would want to tank at that point.