Read more before posting, all your questions have been answered elsewhere.
First, what is the best rotation for this spec? I use ABx3 then Abarr. If missile barrage procs, I do an AM after 3 stacks of AB instead. I'm wearing full epics but I still manage to go oom right before the boss dies. I even use my mana gem at 70% mana, and evocation at 40% mana but my next CD for them doesn't come up soon enough to prevent my from going oom. This means I have to lose dps wanding or limiting my rotation to no more than ABx2, Abarr. I also have to limit myself to using AP and IV only once during each fight, which I pop during heroism. Is there a better rotation I can use that would allow me to sustain constant dps without lowering it?
My next question is, how much dps is exactly one point of Hit, SP, Haste, Intellect, and Crit worth? I would like to know which stats I should make a priority stacking for. Right now I have about 470 haste. I'm beginning to think that my haste is what's driving me oom on every fight, and was wondering if I should replace my haste with more SP instead. Also, would the 25 SP meta gem be better than the 3% crit? Crit isn't worth as much for arcane spec now and a lot of SP is wasted on the 2 blue gems requirement.
My Last question is, what rotation should I use to maximize my dps during heroism? I understand that if my GCD falls below 1s, then using Abarr would be a loss in dps. Should I just do an AM after every ABx3 regardless of missile procs during heroism?
Finally, I heard that the Egg of Mortal Essence procs on AM now. Should I buy that or is it going to be fixed soon?