You don't really need 10 people to attack a base, either side can be done with 1 or require 3 for best rate of success.
The fastest way to win is to just kill spawns and builders. Then hunt down the rest.
I remeber this game where the H-team was pushing hard on us, and we fed them to S3. They were destroying our base, and just then a sneaky marauder destroyed their reactor, armory and spawns because they were to busy hunting us.
Alien won
And oh, the map was Uncreation called "THE map 4 Humans"