Regardless, PT's and Deception Sins (IN MY EXPERIENCE) have the best burst in the game. Marauders (IN MY EXPERIENCE) don't quite have the same damage output in a short space of time.
A lot of it depends on the spec you're dealing with. A Focus Sentinel gets pretty good burst out of being lolSmash, and Combat Sentinels can do some disgusting things with Zen + Precision Slash (100% arpen 1 sec GCD Blade Rush spam). Watchman doesn't really have much appreciable burst, which is the what I have to assume you're used to dealing with.