Quote Originally Posted by Shurrikhan View Post
You'd just hit it basically on CD for free eHP (since you get back more than you spend), or a slight further boost to your max-eHP-against-next-attack/chain by hitting it just before receiving a re-top-off before said attack.

Any substance to that for the DRK itself (i.e., not just the healer) seems entirely on paper / via flavor text rather than noticeable through gameplay.
Yes, this would purely be for flavor. But it'd be how I could see such a thing work.