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1)saber
2)force powers
3)all-out

Who would win

Bastilla's powers:
force lightning, drain, terror, mind trick, battle meditation. force choke, whirlwind
I think she has more but correct me if i'm wrong

Ventress: lightning-got this from a game i played.. not sure, and idk any other powers

You do realize that most of the powers you list come from gameplay and thus are not canon. But Ventress wins sabers and all out for sure. I'm not sure how talented she is with the force so I'll wait to see what others think on that but yeah, Ventress takes 1 and 3 at least.

I think Bastilla takes 2, b/c her value to the republic came from her force skills (Battle med.). She wouldn't be able to stand up to ventress in a saber duel though, as ventress is almost equal to obi (Cestus Deception), while there aren't any major Dueling feats for Bastilla.