I'm writing this comment after finishing this instance with my group consisting of level 33-34-33-29. Myself being 29, as an operative healer.
The last boss is the only thing close to a challenge, yet far away. We were successful with this strategy; killing the left one first(melee), the middle one second(Rocket guy), and the right one(Medic) last. PS: The chest is right there, but it's bugged and that is why you receive no loot. (Most likely why you are on this page in the first place!)
This instance is a 2-part base, allowing break/ new quest conversation in between parts. I got to level 40 on old build and this was the last, most story involved and hardest one of the previous flash point. The second part, as well as first part contains a few known "KOTOR" characters and put up quite a fight.
Tip for last boss (named not disclosed so I Don't spoil) When focused in a strike where he charges at fast speeds make sure target is at 100% health, and has extra defense buffs, as well as to run away as soon as he/she can.