My idea for Living Dead (DRK)

[Shurrikhan]

The only thing I don't like about the "just lower the healing" suggestion is it could lead to accidental early cancellation of WD (and therefore your invuln state), like if you get a crit Excog for example.

Agreed. I don't think LD should end from removing the Doom state.

...Would also love to see DRK get a buff to their self-healing (via Cure potency and lifesteal) at all times, based on missing %HP (starting below, say, 80%), e.g. up to 4x healing below 20% HP. Call it... Blood for Blood.
From there, give lifesteal across all skills during Living Dead. With a burst phase, one should very feasibly be able to cleanse Doom on their own, while it should still be doable easily with minor support outside of burst.