I use Android Tiers, Glittertech (no surgery), and Rimatomics. My colonies always end up with just the most insane defenses with super powered androids.
Anyone who makes their way to my colony will find the most lavish place on the rim.
*We may or may not be using human hearts to till our soil.
My colonists have decent weapons, decent armor, defenses and lodging, but what they really have is games and food. Tons of it. #1 place to game, dine, and get drunk. Or have your coffee, if you don’t drink.