Still untested, but being able to run a ‘tanky’ healer for PvP fixes the main weakness of traditional healers. In PvP, healers are usually the first targeted, because of the value they provide to the enemy team as a whole.
The main combo is Blood Altar + any DoT. Altar + Luminous Shards seems to work the best so far - gets the lifesteal going passively, giving a window to check the rest of the group, cast Ritual/Honor the Dead if needed, or keep pushing damage with Bash or basic attacks.