Demonology Warlock Best in Slot (BiS) Gear List - MoP Classic
Class
Spec
Phase
Gear
Slot
Source

Lightweight Retinal Armor
head
Crafting
Engineering

Burning Necklace of the Golden Lotus
neck
Quest (The Golden Lotus - Exalted)
The Final Power

Shoulders of Engulfing Winds

shoulder
Gate of the Setting Sun
Raigonn

Cape of Entanglement

back
Temple of the Jade Serpent
Liu Flameheart

Spelltwister's Grand Robe

chest
Crafting
Tailoring (Pre-Raid)
Deadwalker Bracers
Bracer - Super Intellect
wrist
Scholomance
Rattlegore
Spelltwister's Gloves
Gloves - Greater Haste
hands
Crafting
Tailoring (Pre-Raid)
Girdle of Endemic Anger
waist
Temple of the Jade Serpent
Lorewalker Stonestep
Leggings of Unleashed Anguish
Greater Cerulean Spellthread
legs
Scholomance
Lilian Voss
Soulbinder Treads
Boots - Pandaren's Step
feet
Mogu'shan Palace
Xin the Weaponmaster
Seal of the Lucid
finger 1
Quest (The Klaxxi - Exalted)
Shadow of the Empire
Vithrak, Gaze of the Deadman
finger 2
Scarlet Halls
Flameweaver Koegle
Relic of Yu'lon
trinket 1
Crafting
Inscription
Vision of the Predator
trinket 2
Gate of the Setting Sun
Striker Ga'dok
Headmaster's Will
Weapon - Jade Spirit
weapon
Scholomance
Darkmaster Gandling
offhand
Stat Priorities
Hit = Exp (15%) > Haste (4717) > Crit > Mastery > Haste
These are general guidelines. Always sim yourself to get your own stat prios.