I play on Irkalla and Mareth. Trader.

I have:
4 Terran colonies. (All in 1 sector) All full pop.
21 Outposts
1 Sector 80% mapped.(Not very explorative)
Resource harvesters on outposts.
Cargoships on trade routes (THEY MAKE HUGE MONEY)
Destroyers.
Cruisers
Moving to Battle Cruisers and Battleships.