Even in endgame content, DRK has problems. You cannot use Living Dead in Savage or Ultimate unless you have a White Mage. If you wish to mitigate you have to press roughly 3 or 4 buttons to mitigate as much damage as the other jobs, who only use 2 buttons. This wouldn't be so bad on a job like Paladin or Warrior, but DRK is anyway off GCD heavy.
I have had different suggestions over time on how to fix this:
-Oblation and Dark Mind should be removed. Their damage reductions should go into TBN.
-TBN should offer besides the 25% shield, a 10% or 15% damage reduction, and if broken grant you a 700 potency heal.
- Instead of Dark Mind, add in a healing ability with stacks or at the cost of Darkside. TBN instead of granting 1 free Edge/Flood, could give 1 use of this ability for free.
- Living Dead can stay the same, however adding in a 20% more healing from all sources ( not GCDs only) would allow the DRK player to use above mentioned heals ( whether it be on 2 stacks, or at the cost of Darkside to heal himself, or at least help the healers)