What DRK misses as a Tank

[Ragology]

Dark Knights only lack one crucial elemental to how a tank functions in Heavensward, an on-demand physical mitigation tool that they can use for every tank buster. There have already been fights this expansion where Dark Knight does not have enough cooldowns to last through the full duration of the fight without dipping into Living Dead, relying on chance, or just attempting to take it in full. Meanwhile, Warriors and Paladins have Inner Beast or Shelltron for almost every single tank buster that comes that comes their way.

Does Paladin have an on demand magical mitigation tool? If not then maybe they designed Dark knight this way on purpose just for the sake of making it a magical alternate to Paladins shelltron ( even though sheltron is ready in half the time, it runs the risk of being eaten by auto attacks so I guess that's some balance.)