Here's what i'm planing to do for my affliction warlock.
I've tried to match as much as possible with affliction's main spells (malefic grasp, drain soul) and soul shards above head. I feel like head shoulders and hands are ok, but chest and waist might be improved.
Tell me what you think about it. I'm a bit colorblind so some things may not match very well.
img15.hostingpics.net/pics/743111rtez.jpg