I personally think that if your under the Exp cap ( 26 ) you should go for Exp gemming/enchanting ( don't forget the old Bracer enchant !!! ) , but as soon as you hit 26 Exp you should go turn to avoidance stats, i personally currently have the luxurious position i get a lot of my stats pure from my gear and am stacking Pure Stamina ( +20 sta epic gems ).
I currently trying to calculate if it helps if i change all +30 sta gems to exchange them for +dodge/+sta epic ones for more avoidance.
I think it all comes down to personal preferences in my book i will never gem my tank for strenght.
Shamarice, Enhancement Shaman ( Active )
ShadowBumble, Warrior Tank ( Retired )