Relies heavily on the Wolfshead Helm, Furor, and Natural Shapeshifter. You will be doing as much dmg as similarly geared mages + hunters (apparently)
Energy Watch also helps (an addon that basically shows a bar that will notify you when your next 20 energy tick will happen, rogues like this one for ambush + backstab)
Basically: Shred, Shred, switch out, switch in, shred, shred. Repeat. instead of sitting at 0 energy and waiting for at least 4 seconds till you can use your next backstab (shred), you shift out to caster and back in, you will get 60 energy with Furor and wolfhead helm and be able to shred almost instantly, rather than having to wait. Yes, requires lotsa mana to do effectively.