So, yes, reforging everything (Haste>Hit>Exp>Crit) besides Mastery to Dodge is the way to go.
However, I see a lot of talk about gemming for straight Agility, which, for the life of me, I don’t quite understand, seeing as it takes ~300 AGI to equal 1% Dodge at 85. The HP loss just doesn’t seem worth the extra Crit and AP, at least at the gear level we’re at, which is to say, still trying to get folks geared up to even get into heroics, with only a dozen or so of us actually clearing them on a regular basis.
…And I still stand by my assertation that the loot tables fucking suck. Your mileage may vary.
(Now, were I an Alchemist and well on my way towards clearing all of the current raid content and rocking 1,000 STA just in trinkets alone, I might feel differently, but some of us aren’t that leet.)
My point is – at the gear level I’m at, STA gemming (Mastery/STA for yellow slots, AGI/STA for red) is the way to go. One extra percent of Dodge is not worth the extra padding the EH from the blue gems gives your healers.
That’s this bear’s opinion, anyway.