I'd like to eventually get solid rotations and specs down here for people to be able to glance at and see, and also to get some solid theorycrafting numbers.
I will constantly edit this post and eventually get it into some sort of searchable and easily readable form.
First off - our set bonuses are as follows
Two-piece set bonus: Increases the damage done by your Lava Lash ability by 15%.
Four-piece set bonus: Increases the critical strike chance bonus from your Stormstrike ability by an additional 15%.
Secondly - Purge has some initial testing regarding talent selection and stat weights. It currently seems as though the best spec on beta takes Primal elementalist at lvl 90, and echo of the elements. I could be wrong as there has been some testing that shows elemental mastery potentially squeaking ahead of echo if used properly. I will try to gather more and more information on this as time goes on and get it posted here with proper numbers.
Here is a link to Purge's sims http://dread-gaming.com/simc/enh_t14_r13050.html
Echo = echo of the elements
PE = Primal elementalist
EM = Elemental mastery
AS = Ancestral swiftness
His testing was done simming with the t14 4p bonuses.
Thirdly - Stat priorities. I need to do a little more research here, or hopefully someone can help me with this, but I know that we no longer need as much spell hit as we did in cataclysm, I think it's something to the effect of 2500 expertise and 2500 hit should put us right where we need to be. I can look this up more tomorrow.
Editing stat priorities as they have changed a little bit and are way different from live.
Still want to do agility > 7.5% hit=7.5% expertise > HASTE > MASTERY > CRIT
This is all subject to change but I will try to keep this updated and do my own testing and simming, which I haven't done a ton of in the past.