How do I turn Bao-Dur into a dark Jedi. I have turned Atton and the Handmaiden into a dark Jedi, but as of yet I cannot get anything out of Bao-Dur. I heard he turns after you leave Dxun. I am already on Dantooine and feel hopeless.

Has no idea

I had a tough time with him too. Bao-Dur didnt go as far to the dark side as the rest of the characters. But, i would sugest to take the hits to your lightside to gain influence over him. I didnt come across anything where i gained influence with him and got darkside points.