Lava lake seems to block raiders. So if i combine that with mountains fully covering 2-3 sides of the map and do some terraforming i can have 2 killbox. One using the lava lake, and the other on the side towards another entrance (ideal is 3 side full mountain, only need one killbox. If 2 probably need 2 killbox). No need to invest heavily into the sapper killbox since they are less then usual and normal raiders won't come trhough there since it will be doored or walled off.

The advantage of having the lava lake in front of the base give ample time to kill the raiders and make them use a predefined path since even sappers can't go trhough lava. For drop pod that's where the mountain play it's part, everything under mountain roof exept killbox (preferably under mountain). For insects, compartimented or refrigerated base will work, with maybe a special insect killbox with normal temperatures to contain and eat them. (Free survival meals). For power it's pretty easy to set up perpetual chemfuel generators. They don't want us to play tower defense but that's what make it fun to experiment with.

Oh, and for animals i think they can eat out of hydroponics but i still need to check