Stat Priorities
Stat Ranking
Crit = Vers > Mastery = Haste
Stat Outline
Crit and Vers are your best stats for a very obvious reason.
Haste and Mastery have no benefit to the direct healing provided by Essence Font, Revival and Refreshing Jade Wind, which are 3 of our biggest healing spells.
Mastery: Gust of Mists can be decent on a fight where you are pumping lots of Vivifys and where raid healing is less important (such as King Rastakhan).
Haste is not useless, but generally does not do as much for us as the other stats.
Races
Horde
Blood Elf is arguably the best Horde Race for Mistweaver as it gives us Crit (our best stat) and a small mana gain via Arcane Torrent.
Alliance
Pandaren is also good for the Food Buff (Epicurean) bonus, and is likely the best Alliance Race.
Enchants
Weapon: Enchant Weapon - Deadly Navigation
Ring: Enchant Ring - Pact of Critical Strike
Gems
Consumables
Flask: Flask of the Endless Fathoms
Food: Bountiful Captain’s Feast
Potion: Potion of Replenishment