Raids

I suck at raid defense I’m more like still in early game I made my first creations that is actually worth something turning radius sucks but it can haul allot but back to the raid how do you guys defend your crops I have a 3 layer concrete and 2 layer wood from the old defenses just tried to play 40 with the previous as a 20 and the difference was insane lots of bots and I actually died 2-3 times

Should I change how I grow or any tips

How do you guys defend your crops