I notice alot of people mention Hellfire Ramparts but they neglect to mention that you can pull the ENTIRE instance with a DK. When you enter the instance there is a ledge to the right park your slaves at the door right there jump on the ledge with a DK and DnD up above you. It may take a couple tries to get it to allow this (you have to have the center of DnD on the side of the bridge almost. This will pull every mob in the instance including the first boss.

The main problem with this strat is it only takes 5 minutes to full clear the instance at that point, unless you go kill the other two bosses then its 10 tops. I used this when I got tired of questing in outlands.