Nocturne's mad skillz to get really high crowd control scores
Press R... Press R A LOT. Press R some more. Off cooldown? Press R!
Between the 10% ult cooldown on takedowns and 15% ult cooldown, Nocturne gets a lot of ultimate, someone who benefits strongly from both masteries. Which results in really high crowd control scores since every time you press R you apply Darkness to 5 enemy champions. Also I think it applies for every second of darkness, not sure on that one, at which case you get +30 crowd control score every time you press R.
Least deserving CC scores, but not much you can do otherwise to change it since darkness is a CC that is entirely vision remove.