Quote Originally Posted by Ashaeya View Post
Dark Arts enables the healing function of the spell. It does no healing otherwise.

Also, it's not about emergency healing, it's just helping the healer in general. returning 1500-2000 health on a combo is worth using at least 2-3 times during the initial pull. I've never had mana issues during the pull or after when using this method and I certainly heal for more and more frequently this way.
You're right. Quitting DRK.