Current DRK is trash, everybody knows it. The worst tank in everything but damage (GNB comes close to beating it in some fights, which means they're not even ahead by much), and you'd find most DRK mains are willing to trade the damage for a comprehensive kit with actual sustain and mitigations. Because every other tank can toss their unique (which has mitigation on it plus a heal of some kind) and one mitigation and be fine. DRK has to use multiple mitigations and TBN (which is just an HP shield with no heal or mitigations) just to survive something, meaning 3 button presses compared to 2.

But here you are wanting the tank that can heal itself to full easily, that has a good amount of mitigations, to also have better damage? Oh honey, you're going to have to lose the insane healing if you want that damage.