As some of the other posters stated its about timing and proper ability usage. First off its important to know and understand your ccs as a watchman. A word of warning though, when done properly your burst damage is low but survivability is high. The first thing to remember is leg slash/crippling throw are extremally effective at mitigating movement and healing. Leg slash can also proc a overload saber charge so should be a priority in your rotation. The second thing is proper usage of zen, dont just pop it when its available, wait until your dots are up. Also i tend to go rebuke at start, saber ward at 75% guarded by the force at 20% force camo dependent on whether you need to close the gap or if your almost dead. Save awe when your dots are on cooldown and use force stasis if hes channeling. I also typically get pacify on after my dots are up because its usually at that part of a rotation that enemies are at there heavy damage output abilities, so that 6 second diminish is overwhelmingly powerful. Finally force kick... way to many sentinels do not utilize this properly or understand what it does. It interrups a targets ability and causes it to be unusable for 4 seconds... thats huge! You have to remember that everything has a cooldown and if you forcekick something with a long cooldown that ability is wasted. Your more pro pvpers wait specifically for certain abilities to force kick because they know by heart all the abilities in the game and there cooldowns, but alot of us are not at that level. I simply just spam it when its up and surprisingly damage and healing is greatly mitigated.