Pugilist/Monk is one of those classes that rewards you for going through your rotations with Greased Lightning, which cuts the downtime by a lot. You're going through your rotations a hell lot faster, and in terms of this game, is REALLY fast. Unlike some mmos (at least the ones I've played), you don't just click a target and spam buttons. You have to be dodging out of obstacles and aoe attacks, and as a melee class, you'll be hard-pressed out of everyone else to avoid taking hits you won't survive. Combined with other off-GCD skills (many can be gotten from cross-class skillsets) its really a lot to keep track of on top of your core rotation alone, and there's enough skills to be exploited in that rotation that you'll likely be wasting that one second you earned trying to remember which to use next while being distracted running around avoiding attacks.