If you had payed attention, she reveals that she just wanted the time to drive Atris completely over the edge, and get to Malachor: it was all a test.
And Boa-Dur is one of the most awesome charactors - leave him unarmed and put a few stat-points into intelligence, and the rest into strength.
And HK-47 is awesome: Die Meatbag
Most worthless charactor is Disciple - weak, and has a polar shift in focus:making it to where you can't keep his skills focused in the same areas easily.(I also got him to Jedi at level 7.