Pulled a week of parses - non raiding content during the week = 16k casts, 51 fizzles. during raid content that week = 771 casts, 1 fizzle.
You have the lv 17 spell Intellectual Superiority right? that's a cast-able spell that does the same thing. . . of sorts. its 6 as opposed to 20 but its still a spell.