Here's what I would do (or would love to see happen)

The Blackest Night: Duration 7s -> 8s
Blood Weapon: 5 Stacks Duration 30s
Bloodspiller: Cure Potency 300
Quietus: Cure Potency 300 (acts like Abyssal Drain)
Salted Earth: Aura that follows the Dark Knight (might be difficult to work for a patch)
Living Dead: Remove healing requirement
Abyssal Drain: Removed (do we really need this?)