I only assume that DRK has the lowest healing is because it has the highest shields among the tanks the only other equivalent to TBN in terms is pure ehp is WAR's ToB and that only increases HP by 20% but with convalescence effect. I guess in Yoshi's eyes and the current heavy mitigation meta, shields > heals. There's a reason why healer shields don't stack while healer dots do. Personally I think its just ppl who don't use TBN on cd during wall to wall pulls in dungeons and sit on 0 MP and expect the healer to carry them. The point of DRK's mitigation is to prevent the damage from happening in the first place and not recovering from it after (which is what WAR already does).
However I will agree that Oblation is bloat. They could have easily made Dark Mind upgrade into Oblation and add the 10% physical mitigation and 2 charge via trait and it would function nearly identical to what Oblation is now.
