Oh how I miss the Heavensward DRK. 3 combo's with the third involving an int down debuff for bosses. Scourge which looked neato and was a great dot. Shadowskin instead of being forced to take rampart in its place so you didnt have that DRK flavor removed. An un-nerfed and genuinely good blood price, an un-nerfed and useful Dark Passenger, a more interesting focus around the gradual draining side-effect of tapping into your darkside which added to the flavor of the class and was something that was taught to you in the questline. Oh, and reprisal of course and even a little baked in stun that you could use if you needed to lighten the pressure for just a moment or interrupt something in dungeons.
Ahh.. good times. Not to mention being considered THE anti-magic tank which was swiftly stolen by Paladins whom can now do it more reliably and easily. Dark Knights now are a shadow of their former selves, with wonky design even in the leveling because you now only get your main ability that you depend on at max level only