The Prognitor

Honestly I don't know what to do. I've been triying and trying so many times now to finish her. I'm a Sith Sorcerer Level 34. it should be easy for me. I desturb her whenever I can, I use Kem as tenk and pull him away when she starts the blue thing. I hide behinde the pillars when she attacks me. I attack her whenever possible. But I still die every time. I might just be the worst gamer ever, as I've seen people lvl 28 defeating her. If anyone would be willing to help me with this, I'd be most grateful.