http://talent.mmo-champion.com/?warr...1,QM8-Rq,10676
Here's the link to what your build should be for maximum dps on single target fights. You do not need weapon mastery if you are capped on expertise, which you are.
Imp Execute is ballin for Arms, and Second wind is completely pointless if you're in pve. It's just a waste of points.
If you are keeping rend up at all times then you should have no problems.
here's how my rotation goes (importance of abilities):
Rend>Mortal Strike>Execute(whenever Sudden death procs)>Overpower>Slam(only when everything else is on CD or is not usable)
Bladestorm on bosses when there are adds closeby. If there are no adds during the fight, be sure to put a rend up on the boss BEFORE Bladestorm so you'll have an Overpower proc as soon as you stop with the roflstorm. Other than that, practice, practice, practice on a lvl 80 dummy until you're comfortable with the rotation and you're pulling decent dps.