Taken from here

Jarg and Sorno are the second bosses for Hutt Hospitality.

The pair of them need to be taken out relatively close together, as they frenzy when one dies. They also have some pretty interesting dialog to listen to as you kill them.

The way we did this was to split DPS, melee on Sorno (the ranged guy) and ranged on Jarg (The melee guy, who does a nasty aoe.) Most of this fight is fairly straight forward.

Some things to remember:
1. Watch out for the purple target circle on the ground, and move out.
2. Kill the probe droid when it spawns, it'll perma CC someone (including tank) until it dies.
3. Keep melee away from Jarg unless he's almost dead, and you're burning him.
4. Sorno heals a lot. Interrupt it. (all his attacks can be interrupted)

Phases:

Phase 1: Tank and spank. Jarg makes Flame Sweeps, Sorno shoots things and heals. No big deal.

Phase 2: They jump to the center. Aggro resets (on Jarg at least), and Jarg just yanks things in continuously and Flame Sweeps. Returns to Phase 1 once this ends.

Phase 3: Sorno jetpacks up to a roof, loses aggro table, and just starts shooting at random people. Purple targeting reticules appear on the ground to be dodged. During this time, the tank currently on Jarg is frozen in carbonite by the probe. The tank on Sorno should pick up Jarg until the probe is killed.