Teras Kasi Archive

I was a TKM before the CU and left. I have recently purchased both expansions and am back into the game, but with questions...
What six trees should I get as a TKM to unlock Jedi?
Which ones are easiest to unlock?
Can you hunt the sith people in groups and still complete your mission? (This is just as I am getting used to a TKM in the CU)

Thanks for anyone's help. I love TKM and don't plan on dropping it.