Once again lazy macros to the rescue, this time with warlocks Destruction spec. This macro goes through a really smooth rotation, while keeping all de-buffs on the target, popping cool-downs and a modifier for casting Conflagrate.
Hope you guys like it!
/castsequence [mod]Conflagrate;reset=target Curse of the Elements,Bane of Doom,null /castsequence reset=target Soul Fire,Immolate,Corruption,Soul Fire,Chaos Bolt,Incinerate /castsequence reset=60 Soulburn,Demon Soul /cast Shadowburn /use 13 /use 14
UPDATED June 1, 2011: Added Curse of the Elements to the rotation (thanks to Strokr).