When would you take DRK over PLD or WAR?

[Faytte]

Anything a War could run out of TP on before Heavensward, a Drk will run out even faster. People create downtime for themselves, hence why some don't feel they have TP management issues. But by doing that, you aren't at 100% uptime, and your DPS is probably not very high seeing as for a Drk to hold high numbers, you have to be going in crazy hard.

There are 3 tanks in the game.

You keep comparing yourself to one of them. Paladins make due and have no real source of tp regen. They also cannot weave in unmend for some continued offense or anything of the sort. You seem hung up on being great off tanks--re roll as a warrior. They excel at it. A dark knight is not as good as a war--but you parse higher than paladins do at the moment, so that is a choice you make.

Not every class (certainly tanks) get tp management. Get used to asking for goad and bards like paladins have been since the dawn of time (or in one case--the dawn of ninjas!).