Atm my favorite combo class is a LS consular/master because of the overall force power that you gain. I mean I go through the entire game hardly ever using my lightsaber. Blast this mob with three force waves, dead, blast the next mob with three force waves, dead. The only time I'd ever use my lightsaber is if I chose to.
But my opinion on this might change because I'm trying a Jedi Sentinel (LS) atm and then I'll go to a weapons master. With the sentinel I have all the skills as class skills and i'm using them all except stealth(not very important to me) It's amazing how many items I can create at a workbench I basically can go solo throughout the game. And then once you get your skill points going after like the first 3 or 4 lvls in the game(as my first and 2nd feats I took repair no longer cross-class and demolitions as no longer cross-class). And since then I've been concentrating on melee with a lightsaber.
Probably the best lightsaber combination I found was Personal Crystal (stats will vary depending on how your character is aligned, etc...),Upari (Dam: +1-8, Atk: +3), Silver Color Crystal, Expert Fencing Emitter (Dam: +3, Def: +2, BBD: -2), Enhanced Bryothesis Lens (Dam: +4, Atk: +3, BBD: -4), and an Ultimate Diatum Energy Cell (Dam: +5). This lightsaber was awesome and did great damage.
I think my favorite force power would be...ahh I got a few, I'll say an offensive one and a defensive one
. Okay my favorite defensive force power was force deflection. Because their blasters couldn't do crap to me . Then my favorite offensive force power would be force wave because it knocks em back, does great damage, and stuns them for quite a while. Found it very useful.
