One of the things i noticed, when i was looking at healers' short small mitigation they get at 86 is that pretty much any of them are better than Oblation. I.e. Aquaveil is 15% mitigation, Protraction is a mini Thrill of Battle, Exaltation is 10% mitigation with 500 pot heal on expiration. So give Oblation a small buff to be like Aquaveil or Exaltation and it would already makes things better. 10% mitigation on 60 seconds is just really really sad.
Edit: Even something like Krasis would help with Living Dead a lot.