Mists of Pandaria Classic Shadow Priest Pre-Raid Gear

The Tier 16 2-set bonus is a must and should replace your Tier 15 4-set as soon as possible. Purified Bindings of Immerseus is your best trinket and should always be equipped once you obtain it; your second trinket slot has a few options depending on the fight and your game-play style. Black Blood of Y'Shaarj is your best second trinket, but requires much more attentive game-play whenever the trinket procs, requiring you to refresh your DoTs at the end of the proc buff for maximum damage. Kardris' Toxic Totem is a close second trinket and provides a passive buff, making it much easier to play around rather than needing to manage a buff. Lastly, Frenzied Crystal of Rage can be swapped in on pure AoE fights, providing a large boost to your AoE damage on multiple targets.

Slot	Item	Reforge	Source
Helm	Hood of Swirling Senses	Crit → Haste	Celestial Dungeons
Neck	Necklace of Fading Light	Spirit → Mastery	Celestial Dungeons
Shoulder	Shoulderguards of the Ternion Glory	Haste → Mastery	Celestial Dungeons
Cloak	Xing-Ho, Breath of Yu'lon	–	Legendary Cloak Quest
Chest	Raiment of the Ternion Glory	Mastery → Haste	Celestial Dungeons
Bracer	Bracers of Sonic Projection	–	Celestial Dungeons
Gloves	Gloves of the Ternion Glory	–	Celestial Dungeons
Belt	Belt of the Broken Pact	Spirit → Crit	Celestial Dungeons
Legs	Leggings of the Ternion Glory	Crit → Haste	Celestial Dungeons
Boots	Bone-Inlaid Sandals	Haste → Crit	Celestial Dungeons
Ring 1	Laser-Slice Signet	Spirit → Mastery	Celestial Dungeons
Ring 2	Signet of the Dinomancers	Haste → Crit	Celestial Dungeons
Trinket 1	Purified Bindings of Immerseus	–	Celestial Dungeons
Trinket 2 (Active Gameplay)	Black Blood of Y'Shaarj	–	Celestial Dungeons
Trinket 2 (Passive Gameplay)	Kardris' Toxic Totem	–	Celestial Dungeons
Trinket 2 (AoE Fights)	Frenzied Crystal of Rage	–	Celestial Dungeons
Main-Hand Weapon	Horned Mace of the Old Ones	Spirit → Mastery	Celestial Dungeons
Off-Hand	Revelations of Y'Shaarj	Haste → Crit	Celestial Dungeons