My guild made it to last boss. I don't have full columi.
Bounty
Parse
As you can see I have bad DPS, and I am under geared. Yes this is story mode, but knowing the fight is WAY more important than gear. Good team work makes all the difference. We spent most attempts on minefield. We decided due to turret enrage to just pick a line and go straight. I viewed that as a dps race and we made it.
My 2 credits.
EDIT:
I do want to note. On that run I did not have the BH ear yet (was crafted purple), the Rakata Implant yet (Was columi), or the Rakata boots (were columi). I earned BH comms for ear on that run. I finished my dailies to by implant after that run. and boots dropped on that run. So take in account I had less than you see on my char.
Knowledge is power.