Don't help people too lazy to do a bit of reading. That question has been asked and answered so many times it makes my head hurt.
Originally Posted by Secunda
It seems CoD is the curse recommended for destro.... Why isn't CoE used? I always start my rotation with CoE --- the damage increase for that minute duration seems like it is more than one CoD... am I wrong?
CoE should be used when the 13% magic damage debuff isn't provided by another class, either a Moonkin or DK specced into Ebon Plaguebringer. In a properly stacked raid, the debuff will be provided and you should use CoD when there are more than 60 sec remaining in a fight, otherwise use CoA.