That spec needs some tweaking for optimal dps. Even in a full tank spec you can do decent dps, which you depserately need since conks lack the raw aggro tools of the guard and would need to be in carnage to out dps/hate a dt.
Something like
http://is.gd/aiWoYM
Swap the points from prot to armor if you are facing a physical damage fight.
My small group rotation is gods3, fa8, bb7, ts, breach, fa9, and hofs5x2 or x1 with fa7 in, depending on shields
My raid rotation eliminates breach since the debuff will likely be put on by someone else. gods3, fa8 bb7 ts fa9 hofs5
Pop BoA, retaliation and irritate before last step of bb7 for quick pull aggro, otherwise cycle them into your rotation for sustained aggro
I have a ramshackle mix of k6 and raid gear and i generally do between 800-1000 if i am maintank, up significantly if i am off tank and have time for frenzy