Jedi Sentinel

Combat is one of the ultimate specs available to any class for PvP, I played with a Jedi Sentinel until lvl 44 in the test, when you talent properly in the combat tree, you can kill people before then can react. Use Force Leap, Zealous Strike, Precision Slash, Strike, Blade Rush, Blade Storm as your starting rotation for burst and people are already at 45%ish health and you have like 2 focus point still to spare, then you keep using Strike(to generate more focus, plus its your auto-attack so use it whenever you can for extra damage) and use things like Cauterize(High damaging attack with a DoT), PvP-centric abilities like Leg Slash, Crippling Throw(it is the only ability in the game that gives a healing reduction debuff, if I am not mistaken, plus it also immobilizes the target due to Combat tree's Displacement talent), Force Kick(One of my favorite abilities due to sheer annoyance it causes), Force Stasis(Yes, I use it as an interrupt, so sue me), Pacify(to make him/her miss his/her damaging, knock-backs and kiting abilities when you are trying to close the gap), Rebuke(as a defensive cooldown and to deal damage when you are trying to close the gap) and then finish with Master Strike (Which has now a almost 100% chance to hit fully due to the Combat tree's Debilitation talent(100% chance to immobilize the target for the duration of Master Strike)), and Dispatch(you learn this ability at lvl 46). If the target is not dead by now, go back to the abilities I mentioned for using as starting burst, they will most likely be off-cooldown. If you are being kited too much to your liking, then use things like Force Camouflage, to break all your roots(Another great PvP talent for the Combat Tree) and get extra speed boost, and Transcendence to close your gap.

Having played WoW for several years as a Gladiator Death Knight and a very high-rated Warrior, I can tell for sure that Jedi Sentinel's Combat tree is nothing to laugh at. If played right, Combat Sentinels can be a force(pun intended /wink) to be reckoned with at high level PvP and PvE, topping DPS and Kill charts but still this talent tree needs to be looked at by the developers because it is not putting out the burst that it should. Having said that, the Watchman talent tree is without a doubt the best talent tree for PvE for Jedi Sentinels.

Strength is the primary stat for Jedi Knights and Sith Warriors

Willpower is the primary stat for Jedi Consulars and Sith Inquisitors

Aim is the primary stat for Troopers and Bounty Hunters

Cunning is the primary stat for Smugglers and Imperial Agents

Priorities might be a bit different on build but Strength is the main stat period for all Jedi Builds.

A DPS Sent will want more STR over END and the Guardian is semi reversed if tanking.

PvP has it's own secondary stat and it's not a build defined one so it does not matter.

* Expertise - PvP stat. Increases damage and healing done, reduces damage taken.

The three skill trees breakdown as

Watchmen-Main focus on DOTs-defiantly the PvE spec
Combat-All about burst damage and proccing extra attacks from Ataru Form-Mixed PvP PvE, but does not excel in either-Currently the "weakest" tree
Focus-This tree is shared with the Guardian AC and has a large focus on CC, some AOE, and Gap closing-The PvP spec for sure