I was fighting the Silver Sentinel in the Necropolis (Dragonspyre). Before casting my Wraith (with all the traps and blades equipped) I had 1669 health. The spell then did approximately 3500 damage to the Silver Sentinel (killing him in the action). With that, I should have recieved approximately 1750 health back to me as a part of the spell.
However, once the enemy fell, I still had 1669 health.
Is there a problem with the spell, or have the rules of using "Damage & Heal" spells changed?