After many, many attempts, I finally made it through last night without having to get any help. I'm a 42 Marauder (Annihilation build) and used Jaesa. Basically, you have to make sure you keep interrupting the Force Storm, Force Lightning, and Death Field powers that the baddies are queueing up during the fight. Pre-fight, I'd use one of my relics and fire up Saber Ward and Cloak of Pain before force charging into the fight. Keep your companion and yourself out of the holographic damage circle that shows up on the ground during the big fights and, with a little luck, you'll survive. I let out the best, and loudest, Rick Flair "Whoooooo" of my life after I got it done (think I woke up my brother ).
edited to add:
Proper timing with a medipac and Call on the Force were needed too