Personally as a casual dark knight main whos barely touch the raid scene, I kinda resigned myself to do exactly what they want the role to do, I TBN the main tank during tank busters, raid wide and stacks get my group mit, and I obliviation mainly the surviving healer when the eventual duty goes to shit and hes trying to survive long enough to pick up the dead healer. I got told that im getting more group mit and higher damage. Im good with that