I have built a circular base for my latest playthrough - pretty much like this design:
http://www.cropcircleanswers.com/TWI9_Fig7_280.jpg
Where the black lines are in the middle of the circle, I have corridors. I basically wait for the attack and depending on where I can pick off raiders I just get my pawns to attack. A circular design works well as the raiders spread out and attack different areas of the base.
http://www.cropcircleanswers.com/TWI9_Fig7_280.jpg
Where the black lines are in the middle of the circle, I have corridors. I basically wait for the attack and depending on where I can pick off raiders I just get my pawns to attack. A circular design works well as the raiders spread out and attack different areas of the base.