Thinking about Emanee's dps, I'm thinking about using a variant of a macro a fellow shadow priests uses. It's a sequence macro that casts a list of spells in order, moving on to the next spell when another is unavailable. I'm thinking of leaving dots completely out, but listing shadow word: death, mind blast, and mind flay in the macro. If I constantly spam that macro, it should cast one of those three spells. And since mind flay doesn't have a cooldown, I'm guaranteed to deal damage.
I'll write it when I get home tonight and practice with it this week. Hopefully, it will be raid-ready by Thursday.