Enchants.

[Lazypity]

Just letting you guys know since I see a lot of people that are not aware. They recently changed some of the enchants in live for example Superior Mastery on gloves is now giving 25 mastery instead of 13 and gloves and Super Int on bracers is giving 16 int up from 12. The bracer one is not really that big of a deal but the 25 mastery to gloves is definitely worth getting in my opinion.

[EgonS]

Yes I also noticed this last night. Switching from Precise Strikes(15 crit) to 25 Mastery gave me about 100dps gain in Simulationcraft 603-4. The gain will be more in multiple target fights.