In zul´Drak there is a quest where you are to put out the fire of burning houses using a water bottle, if you have specced in the DK talent
Vendetta, each time you dose a fire, your vendetta procs, healing you.
If you pull all mobs, put up DnD and spam your water bottle, you can AOE grind easily without resting, and seeing the mobs respawn fast its pretty nice xp.