Single Target: Haste > Crit > Versa > Mastery
AoE: Haste > Crit > Versa > Mastery
Haste: Increases your auto attack speed and increases your focus regeneration while also reducing your global cooldown. It also reduces the cooldown of Kill Command, Wildfire Bomb, and Butchery, and also increases the DoT damage of Serpent Sting.
Crit: Increases the chance for all your attacks to deal double damage.
Versatility: Increases the damage of all your spells and abilities and reduces incoming damage.
Mastery: Increases the effect of Mastery: Spirit Bond, which increases the damage of both yours and your pet's focus spending abilities. Unfortunately, it does not increase the damage of Wildfire Bomb, which is our primary damage ability in AoE.
The best way to calculate stat priorities for your character is to "sim" your character. Method Raider Jaerv has written a series of Metafy articles to help!How to Sim in World of Warcraft
For pure DPS output, Dwarf is your best race for Alliance and Tauren is your go-to pick for Horde.
Weapon: Sophic devotion
Neck: 3x Tiered Medallion Setting
Chest: Waking Stats
Cloak: Regenerative Leech
Bracers: Devotion of Leech
Ring: Devotion of Haste
Legs: Fierce Armor Kit
Boots: Watcher's Loam
Primary Stat and Haste - Fierce Illimited Diamond
Haste and Critical Strike - Crafty Ysemerald
Rune: Howling Rune
Augment Runes: Draconic Augment Runes
Sharpening Stone: Primal Whetstone
Health Potions: Dreamwalker's Healing Potion