**Affliction**

Stat Weights:

Int = 4.23

Mastery = 2.36

Hit = 1.87

Haste = 2.41

Crit = 1.54

For a Red Socket, you might instantly think that throwing a 160 Intellect gem in is your best option. I show here why it is not...

160 Intellect = 160 x 4.23 = 677 DPS

80 Intellect/160 Mastery = 80 x 4.23 + 160 x 2.36 = 338 + 377 = 715 DPS

80 Intellect/160 Haste = 80 x 4.23 + 160 x 2.41 = 338 + 386 = 724 DPS

80 Intellect/160 Hit = 80 x 4.23 + 160 x 1.87 = 338 + 299 = 637 DPS

Therefore, if you are not at hit cap, gemming 80Int/160 Hit is only an 87 DPS loss from optimal, and you can see that hybrid gems are better than pures, no matter which one you gem for.

For a Yellow Socket, we explore the option of Intellect vs Mastery here...

80 Intellect/160 Haste = 724 DPS

80 Intellect/160 Mastery = 715 DPS

320 Mastery = 755 DPS

320 Haste = 771 DPS

Therefore, for a Yellow Socket, it is more beneficial to gem straight mastery or haste over any intellect hybrid gem, but only ever so slightly. Here, take whatever gem is cheapest.

For a Blue Socket, we explore the option of Intellect vs Hit...

160 Hit/160 Mastery = 677 DPS

80 Intellect/160 Hit = 637 DPS

320 Hit = 598 DPS

**Demonology**

Without going into all of the detail above, I'll simply do the math and list findings here. If you need assistance with your calculations, post below and I'll help you through them.

Red Socket

160 Int = 640 DPS

80 Int/160 Mastery = 568 DPS

80 Int/160 Hit = 730 DPS

Summary: Gem 80 Int/160 Hit but do not go over Hit cap. If at Hit cap, gem pure Int.

Yellow Socket

320 Mastery = 496 DPS

80 Int/160 Mastery = 568 DPS

160 Mastery/160 Hit = 677 DPS

Summary: Gem 160 Mastery/160 Hit (Sensei)

Blue Socket

320 Hit = 819 DPS

80 Int/160 Hit = 730 DPS

Summary: Gem 320 Hit and then 80 Int/160 Hit but do not go over hit cap

**Destruction**

Red Socket

160 Int = 640 DPS

80 Int/160 Mastery = 620 DPS

80 Int/160 Hit = 714 DPS

Summary: Gem 80 Int/160 Hit but do not go over Hit cap. Once you Hit cap, pick between pure Int and Int/Mastery (difference is negligible)

Yellow Socket

320 Mastery = 602 DPS

80 Int/160 Mastery = 620 DPS

160 Mastery/160 Hit = 694 DPS

Summary: Gem Mastery/Hit (Sensei)

Blue Socket

320 Hit = 787 DPS

80 Int/160 Hit = 714 DPS

Summary: Gem 320 Hit until hit cap then gem Int/Hit but make sure you don't go over Hit cap. Use gems for hit and save reforging for better values.

**Jewelcrafters**

JC's get their choice of 2 super gems. The viable choices are:

320 Int

480 Mastery

480 Hit

Looking at stat weights, this is how good the JC gems are for each spec:

Affliction Red Socket

320 Int = 1354 DPS

Demonology Red Socket

320 Int = 1280 DPS

Destruction Red Socket

320 Int = 1290 DPS

Because the Intellect gem is the biggest gain, you want to replace two red sockets with your 320 Int gems. This also allows us to calculate the value of Jewelcrafting as a profession for each spec.

Affliction = 1354x2 - 724x2 = (1354-724)x2 = 630x2 = 1260 DPS

Demonology = 1280x2 - 730x2 = (1280-730)x2 = 550x2 = 1100 DPS

Destruction = 1290x2 - 714x2 = (1290-714)x2 = 576x2 = 1152 DPS