Originally Posted by
Bovan
Haste isn't all that useful for AoE, or Survival for that matter. It's a mostly single target stat which is stronger Beast Mastery and Marksmanship. So to answer your question a crit>mastery>haste build will probably net you better results.
But honestly isn't not going to matter much if at all. Granted my item level and gear is much, much higher than 520 but when I do a dungeon packs usually die when Serpent Sting ticks once. That is, when I don't run around as Beast Mastery with a melee weapon and just smack mobs in the face instead.