That's why the calls for buffing Abyssal Drain keep coming up. You don't use Abyssal Drain in single target bosses (anymore), so it having a good cure potency on it would not upset the balance at all. As for Oblation, a Bloodbath-ish effect on it would make it one hell of a good move for DRKs. Anybody hit with Oblation would be able to heal themselves for the next 3 attacks they hit an enemy with a weaponskill/spell, at 400 cure potency. Amazing for helping others get their health up, and with a 1m cooldown on charge, it's not something you're going to be able to spam, encouraging actual thought on using it.