another version...

Code:
/cast [noform] !Shadowform
/cast berserking
/use 13
/use 14
/castsequence  [nochanneling] reset=target Shadow Word: Pain, Vampiric Touch,Mind  Blast, Mind Flay, Mind Flay,Mind Flay,Mind Blast, Mind Flay,Devouring  Plague,
/cast Mindbender