I've been stacking crit and I've been very satisfied with my dps, I aim for Crit and multi strike stacking on my gear. So much dps when you get a fat crit + multi strike chaos bolt. When you havoc chaos bolt and both of them get a multi strike proc, the feeling is awesome haha. I honestly haven't tried stacking mastery though. Do you have 2 sets of gear?

Ive stacked crit crit/ multi aswell but after the last nerf it seems mastery is better

may I ask where you read this? Or do you actually test this yourself? I guess since I'm an enchanter, gear that I don't need I just auto de. Some pieces can have crit and mastery right? or is mastery/mult the best? Sorry for so many questions, I just love pullin mad deeps on my lock.

Been reading up more and more and I honestly just can't get a straight answer. I assume getting pieces of gear with Crit and Mastery will be the best, but I don't know which is better. I read that crit is for supremacy and mastery is for sac? But I don't know Anyone have some concrete sources?

http://www.icy-veins.com/wow/destruction-warlock-pve-dps-statistics-priority

Like it says here, crit is more important cause u get crit from devastation and chaos bolts dam is increased by ur crit. Mastery would be better if your doing multiple targets cause it buffs the ember burning spells.