Making robust base defenses is really fun! Especially since you can't run around and fix it after the fact.

I made a blueprint book for my multiplayer game with my friends, base walls have tileable blueprints that can be upgraded in place, level one just the wall, level two wall plus roboports, level 3 plus lasers etc etc

Now that we're totally off of the starting planet, the wall is quite extensive. Dragon's teeth to the edge of laser range, three ranks of lasers in a line, flamethrower behind everything, and two count them two, old school machine gun turrets.

The flamethrower, and the machine gun turrets, provide a little resilience in the event of a power failure. Gives time for emergency measures to get in place. Not that the machine gun is going to do much against highly evolved biters, but it will draw them sideways down the wall rather than into the base