Originally Posted by DPSDK

First off, there are way too many variables in raid encounters to effectively rate mastery vs haste. I wanted a controlled environment with everything the same except for mastery and haste. As far as testing, I performed 5 different sessions lasting 3 minutes each with stacking mastery. I then performed another 5 sessions stacking haste. Numbers did change obviouly, but the haste dps was always less than the mastery dps. Mastery was around 14.6k dps while haste was around 14.2k dps.