Kos-Amul, Primary Settlement and Starport. Go big, take their spaceport, the means of mass transit, get us FTL drive technology, disable their air support, display our power by taking their second most secure position next to the palace.
We don't need to have total control of the city itself, just the starport and the largest means of transportation of large groups, the easiest and most secure landing site for further reinforcements to deny that to the enemy.
Once we have that we can begin our efforts to establish ourself as the ruling group of Nar Kaaga, demanding surrender and having a large chance of getting it from all parties if the fight goes well enough in our favor, as it should unless these war droids are a bigger deal than I imagine.