the spell I realy hate is Vision of the tenth eye, you get to use this spell once and thats it.
maybe if there were some bad mages running around using invisibility and trying to attack you then the spell has some use.

Command Daedra (when it is being used by an enemy) and the Spriggan mind-control power. I send out my awesome Dremora Lords to kill some baddies for me only to have some stupid tree girl or a Dragon Priest turn my homies against me and then I get carved to pieces. It's so unfair! They are MY Dremora Lords, not theirs!