This module addon requires SpellFlash to function.

This addon is able to make suggestions of what spell you may want to cast next by flashing on top of the spell buttons.

White - Default
Yellow - Limited Time or No Global Cooldown
Purple - AOE or Positional Damage
Blue - AOE Debuff
Orange - Finishing Move
Aqua - Spell Interrupt, Reflect or Dispel
Green - Self Buff or Turn Autocast On
Red - Emergency Mitigation Cooldowns or Turn Autocast Off
Pink - Optional

I was using SpellFlash: Priest but did not like the rotation and he was missing a number of components that are important for shadow priest dps.

I added the following code so it will remove the stupid blizzard overlay glow that gets stuck on Mind Blast sometimes

ActionButton_UpdateOverlayGlow = function() end
ActionButton_ShowOverlayGlow = ActionButton_UpdateOverlayGlow

I use the following Macro witch will use my trinkets and Archangel

#showtooltip Archangel
/use 13 
/use 14
/cast Archangel

Things I added to this version that didn't exist in SpellFlash: Priest

If you don't have Empowered Shadow up and have atleast 1 shadow orb this will now prioritize Mind Blast as the first spell, and then continue to the normal dot rotation.
Added Archangel
I prioritized Shadow Word: Death up a little higher in the chain.
This version will wait for at min 2 shadow orbs before casting Mind Blast.
I took out the shackle undead flash..

This will do the following:

Opener:Shadow Word: Pain > Vampiric Touch  > Devouring Plague > Mind Blast 2-3 Orbs > Mind Flay until first Orb*
Target Health > 25%: Vampiric Touch > Devouring Plague > Shadow Word: Pain > Mind Blast 2-3 Orbs > Mind Flay
Target Health < 25%: Vampiric Touch > Devouring Plague> Shadow Word: Pain > Shadow Word: Death > Mind Blast 2-3 Orbs> Mind Flay

SpellFlash: Shadow Priest