ZOMG TOO HARD

so i was talkin with some guildies and we got into a discussion about what spec's rotations were the hardest

we pretty much came to the conclusion that mutilate rogue and aff lock rotations were some of the most challenging in the game

mutilate: for the precise timing and coordination along with watching your ability durations
affliction: for having to keep track of so many different durations on things while still casting spells

i was wondering, what do YOU guys think the hardest/most challenging specs to play are, and why?

EDIT: for you smart asses out there, im refering to rotations relative to each other, i dont care whether you think dps rotations are easy, im talking about which of them are harder (notice the "er") than the others