There's no escape - 4x death and decays (which has a 80% chance to make them cower- lol), 4x round robin death grips, 4x anti magic ZONE (50K magic damage absorbed), 4x anti magic SHIELD, bone whatever, Ice bound fort.

You're not killing ANY DK quickly. I've killed up to 3x level 80s who tried to gank me. No one can get away with the Death grips and the 15% run buff to group - including rogues.

And the sad thing is, I really don't even know how to play DKs yet, I'm not using half of the good spells.