Hey mate!
well, to be sure of what you need and how to get there, you might wanna check out this thread
http://elitistjerks.com/f81/t37807-d...ps_discussion/
this is where the theorycraft nerds share their info and they are usually right about what to do :P
also check out this
http://elitistjerks.com/f81/t37462-w...n_spreadsheet/
put all your character info into this spreadsheet, and it will tell you what you need to aim for
this all ends up in one question though, how far are you willing to go to learn your class etc. couse reading all the posts on that forum takes alot of time, but if you're set on becoming the best dps warrior you can possibly be, this is the way to do it
hope you find this usefull mate. good luck to you.
Edit: Do not stack Expertise if you are going arms dps, as expertise will lower the chance for overpowers, and you DO want overpowers as overpowers > slam.
anyway, arms dpsing is a prio list not a rotation;
Execute>Rend>MS>Overpower>Slam>heroic strike(althoug many people dont use heroic strike as it messes with the "rotation" and due to human errors, you're not gonna be able to do this prio list 100% accurate)
correct me if i'm wrong please