Half of the posts about Life Grip find it "cool" because it's gonna bring laughs. When thinking about its actual usefulness, I'm finding very few PVE situations where I would actually want or be able to use it. Even if I wanted to save a slacker dps standing foolishly in the fire (which I don't) I'd have to know exactly where everybody is standing around in the area and they are taking damage from "something" in their location. That would be almost impossible when having to watch 25 health bars and do all the other actions a fight demands (keeping myself out of the fire, avoid incoming projectiles and the like etc). We'd have to be gods to have that awareness. Unless that person stands out for some reason (think of a chaotic fight with 25 persons jumping around) I'd never use that ability.
On the other scenario where everybody has practiced and is doing their job/positions well most of the time, guess what, I'd never use that ability.
Therefore a big NO from me.
The only interesting thing in that preview text for me as a holy priest is chakra. The rest is just meh.