I'm no expert on playing Arms (It's been months since I have), but I'll give the best advice I can.
Glyphs + Spec
Overpower (If <1.5 seconds before a TfB proc), Rend (Do Not Clip) > Mortal Strike > Overpower > Execute > Slam. Heroic Strike at 80+ Rage.
Gear + Gems
You're a bit over hit cap, so you can afford to drop about 3% hit (since you're alliance). It would be nice to get yourself up to about 722 Armor Pnetration Rating (soft cap) to cap with your NES proc. Other than that, prioritize Strength > Crit > Agi> Haste == Expertise. As for gemming, try to use 20 Strength (or ArP, if below soft cap) in red sockets, 10 str/10 crit in yellow sockets with 6 STR bonus or better, one 10 stats in the blue socket with the best socket bonus, and the 21 agi 3% crit dmg meta. For all other sockets (blues/yellows with bad bonus) use red gems only.
I found all of this information on EJ, thought I suppose theres also a good deal of it here if you look around. Hope it helps.