Another 2 suggestions I have regarding TBN, Dark Mind and Dark Arts:
- If TBN breaks, your next Edge / Flood of Shadow heals you for potency equal to damage dealt by said ability. No cost, 15 sec CD. It should also have Oblation's 10% damage reduction into it. Solves sustain in dungeons and gives DRK some sustain.
- Dark Mind converts all damage mitigated into healing for 10 seconds. So if you use Rampart and a mob hits you for 100 damage, you heal for 20 damage. Works on shields and damage reductions. 60 seconds CD. Works well with DRK being the mitigation tank.