I added Shar Dakhan as the Sith commander in this battle. When we're introduced to Shar Dakhan, he has a distinct helmet and outfit, with two long horns, and a sort of horned backpack. This Sith Lord is also seen breaking the ranks of the Kirrek defenders right before Ooroo sacrifices himself. Since all Sith in the general area died, I assume he died with them. This also fits consistently with the look on the remaining Sith General (the one with the ring in his nose) with his hand outstretched as though he had lost someone very close to him, ie his Commander. The immediate end of the battle also fits, if Shar died in the assault, it's most likely that the Sith would retreat.