I was under the impression that what Traya used was not Drain, but Sever Force. The same technique that was used against her by Nihilus and Sion against her.
There are techniques in the Force against which there is no defense.
Let me show you, you, who have forever seen the galaxy through the Force. See it through the eyes of the Exile.
No one can defend(except possibly Plagueis, as evidenced by his Book of Sith entry) against the Sever Force technique. How do we know this? Because even the Exile, who was a wound in the Force and immune against Nihilus' mega drain, was powerless to resist when the three masters attempted to sever her for the Force.
And because Ulic himself, who taught Anakin to defend himself from being drained, was powerless against Sever Force.
Obviously Kreia can't take Mace, Yoda and Obi-Wan in combat, so the only question is, can she preempt them and cut them off from the Force before the duel starts? She did succeed against Vrook, Kavar and Zez-Kai Ell, but personally I think she has little chance here.
So yeah, Kreia loses. Badly. At best she might be able to kill Obi-Wan through Force attacks, but even that is doubtful.
Originally posted by Lord Stark
[B]Uh yes. Kreia presumably gives the Exile a run for her money, the same Exile who canonically stomped the entire Trayus Academy.
For the record, I think Kreia is much stronger than the Exile. In fact she is the strongest Force user of her time, except Nihilus.
The Exile fought her way through the entire Trayus academy, killing the Sith in small groups. But Kreia effortlessly killed a dozen of them without even blinking. The Exile fought Sion to a stalemate and then convinced him to let go by subverting his will. But Kreia totally broke Sion's will, choked him and made him her lapdog.
There is much that indicates that Kreia took it easy on the Exile in their final encounter. The fight was not about the Exile being stronger than Kreia, it was about the Exile having the will to kill her. Kreia's purpose throughout the whole game was to help the Exile become some sort of ubermensch, someone unlike any other Jedi or Sith, someone who used the Force but was not dependent on it or a slave to its will.