v.112 - Update Highlights: An Exocit Adventure Awaits

CoH, phantom blow, blade fury, bloody storm. Upper stab too I guess.
Main skills, no cd (Maybe on CoH, wouldn't know).

Chains has a cooldown in PvP. Bloody Storm is really only for mobbing and running away. Tornado Spin is used similar to Rush (push people or ganking kills).

Majority of the your kills comes from Chains of Hell, Final Cut, Owl Spirit, and approaching people with Dark Sight (all of these have cooldowns). Blade Fury and Phantom Blow are only really used to clean up kills or if you're running around with a Final Cut bonus or a glove. Flash Jumping into a mob and spamming Blade Fury will get you enough points to float above last place.

So yes, you actually do need to rely on cooldowns to win .