Why you talk like drk and war are only tanks in this game lol.
The two are dps oriented with tools that works without the tank stance. Abyssal drain itself is an aoe, aggro generetor, and a sustain cd.

bloodbath/vengeance/operpowers work as the same.

Op talks about Tank stance in general I guess, so consider that Pld is a tank too which can do the same huge mega pull like other 2 tanks but NEEDS and I repeat NEEDS tank stance to do so. Otherwise a couple of good dps can steal aggro every single pull.

There is few people out there that play pld as main and need tips and understanding from others you know.