So I have enchanted, gem, gear with this priority for stats. Expertise (to 7.5-15% (depending)) = Hit (to 7.5%) > Agility > Haste > Crit > Stamina > Mastery > Parry > Dodge. but today I check http://www.askmrrobot.com/ and its telling me to change all my gems and enchants to stamina. I have been doing great with my build usually take less dmg than any other tank in raid.
this is my character