How about this for Haunt

Haunt- Commands a spirt to haunt the target-dealing DoT and returning 75% back as a HoT to nearby party members. Potency 100 scales with MND
Trait Bonus: increase range of HoT and returns 90% of damage back as HoT.

Not sure if it's OP. But would be a different healing style. Ala Vanilla Shadowpriest.