Hi, I'm currently leveling my priest and I'm just about to hit 90. I'm curious to know what type of gearing I need to go for to achieve golds in challenge modes. Is mastery still the end all be all stat that I should stack for them? Could crit be better just for challenge modes? I've completed all 9 challenge modes on my mage so I have an understanding of how challenge modes work. I should be able to gear myself just from heroics to get a semi-optimal gear set for them. Any advice would be very appreciated, especially advice from priests that have completed the challenges.