Berserkingis a strong offensive cooldown, and Beast Slayingis powerful while leveling, but is only useful for a handful of bosses in raids and dungeons. Bow Specializationis also quite strong, but only if you are using a bow. Unfortunately, you will not use a bow for most of Wrath in P...
Mastery, through Mastery: Master of Beasts, increases the damage done by all the pets and creatures that you summon. This includes your main pet, Dire Beasts and more. Haste increases your attack speed and Focus regeneration, reduces your Global Cooldown from 1.5 seconds to a minimum of 0.750...