Inexperience with the job doesn't really computer to being terrible I can DRK in savage even though I'm the main paladin because fundamentally the concept is the same, CDs on TB's, SW instead of SENT TBN instead of Sheltron. Of course, there's far more in terms of optimization but as long as you have some experience tanking, in general, you shouldn't suck enough to result in casual content wipes. I would say 99% of the time its the player because they're bad to combine that with the fact that DRK is definitely the hardest of the tanks to actually play well (because the class is so bad) then you've got a recipe for disaster. Alot of players THINK they're playing the class right but don't often look too deeply into whether they are or they aren't.