Combat is always the 3rd avenue for points. It forces players to be conservative with parachuting too many people down.
I think it acctually works better with 2 cause you dont choose who you going after.
I like the game better with lower player counts.
Finally we play that you need to build at least one township, makes people have to consider when to parachute and be vulnerable
Is that a variant? Did you post it in the forums?