Stats Priority:
Arms
Strength: Gems as posible of STR/Stamina or STR/CritsHit: you must have the 5% cap (600 hit rating), enchant boots and bracers for 50 hit rating and socket for hit rating if necesary.
Resilience: use both trinkets of resilience [Bloodthirsty Gladiator's Badge of Victory] and [Bloodthirsty Gladiator's Medallion of Tenacity]. An optimal resilience is at 3340 around 35% damage reduction from all sources (melee and magic) plus your 5% of Battle Stance for a total of 40% damage reduction.
Crits: Try to get 7.70%(more or less) and with your Battle Shout you will reach 10% crit chance. Reforge all you can to crits.
Mastery: Not really important to Arms, a 20% should be fine.
Expertise: More Expertise, less chances for your attacks to be dodged, and less chance for Overpower to activate. The only utility of this stat is to reforge to Crit.
Haste: Completly worthless for warriors. Just reforge it.