9 troopers per ship, subdivided into groups of 3 to make initiative a little more interesting.
The players are on the roof of a hotel. 3 of them, plus their captive, are running out from the stairwell, their ship (with remaining 2 players) is on the roof, and one of the stormtrooper transports has landed and unloaded badguys. The players on foot, their ship, and the badguys ship are roughly in a triangle, and the remaining 2 badguy ships have yet to arrive on the scene. My guess is they're going to haul ass for their ship and not get bogged down in a gun fight.
I foresee a ship combat with 2-3 of the transport ships, so I need a statblock to use for them.