Now I'm not a math whiz, so I don't know what sort of calculations need to take place to determine which items are best in slot for affliction warlocks. I know a good deal of it depends on making sure you're hit capped, but when it comes to the choice between crit and haste (granted, I am affliction) I get a bit torn.
So from my research, I have determined that a few items are best in slot regardless of hit/crit/haste. These items are:
Helm: Hood of Rationality
Neck: Wyrmrest Necklace of Power
Bracers: Unsullied Cuffs
Belt: Leash of Heedless Magic
Boots: Arcanic Tramplers
Ring 1: Signet of Manifested Pain
Trinket 1: Dying Curse
Trinket 2: Illustration of the Dragon Soul
Weapon: The Turning Tide
That gives us 104 hit.
As a guild raid organizer, I can pretty much guarentee that I will have 1% hit from Heroic Presence and 3% hit from a Shadow Priest. So my goal is 263 hit, 263 - 104 = 159.
I would like to aim for the 2pc. T7.5 set bonus. The below list assumes using +19 sp gems. The bold items I have, I need help deciding on which combination is best in slot:
Shoulders: Valorous Plagueheart Shoulderpads vs Mantle of the Locusts vs Mantle of Dissemination
Back: Cape of the Unworthy Wizard vs Pennant Cloak
Chest: Valorous Plagueheart Robe vs The Sanctum's Flowing Vestments vs Robes of Mutation
Ring 2: Band of Channeled Magic vs Lost Jewel
Hand: Valorous Plagueheart Gloves vs Gloves of Token Respect
Leg: Valorous Plagueheart Leggings vs Leggings of the Wanton Spellcaster vs Leggings of Mortal Arrogance
OH: Matriarch's Spawn vs Accursed Spine vs Surplus Limb
Wand: Wand of the Archlich vs Plague Igniter vs Gemmed Wand of the Nerubians
My goal: Not take someone else's (holy priests, shadow priests, mages) bis if it's not bis for me and still reach 263 hit.