You do use dots with it, what the fuck are you talking about? Stop giving people wrong information.
Go with CoP dotweave, which means you go dotless until you do devouring plague.
Dotweave "Rotation"
Mind Blast 5th orb > Shadow Word: Pain > Vampiric Touch > Devouring Plague > Mind Blast > Mind Flay: Insanity (twice) > Mind Blast > Shadow Word: Death > Devouring Plague > Mind Flay: Insanity (twice + clip) > Mind Blast + Mind Spike, repeat