Based on the Kalu'ak Pigment-Stained Robes. The helmet is priest-only.
Ruthless Gladiator's Mooncloth Helm Priest-only PVP
Fel-Tinged Mantle Drops from Vexallus in Magister's Terrace
Pigment-Stained Robes Kalu'ak rep gear
Nethershard Girdle Drops from Moroes in Karazkan
Moonshroud Gloves Crafted by tailors
Ethereal Boots of the Skystrider Drops from Nexus-Prince Shaffar in the Mana Tombs