It didn't work out so well in terokkar without vendetta, but with it..
Oh man, do I LOVE this build for grinding mobs. :)
Watch, and be amazed.
Just for kicks, I'm adding a second video using the same build, but in unholy presence for faster rune consumption. You can see where the bigger up front burst of using unholy presence can come in handy, especially for PvP. :)
The second video is a bit longer, but is probably a better watch.