Living Dead is actually pretty much equal to Hallowed Ground in A4 Savage because the tank buster lasts 12 seconds. It's actually a bit better with the shorter cooldown.

Holmgang is pretty crippled in A4, but the short cooldown still makes is a good skill. The "oh F*ck" button is pretty well balanced already. It would maybe be good if Living Dead triggered a sound effect or something to make it more obvious to DF healers.