first of all its important to update dlc like they never updated himfjall from pretty much never got updated. and if they just make sometimes apocolypse appear from control points, that can work. like why is the apocolypse robots trying to destroy our bases?
like fnix is main purpose is to make bases and evolve
military robots purpose to be at military bases
prototype robots are tested robots that has been never upgraded and just have no main purpose
apocolypse robots rarely spawn from mainland and thats it nothing else.
( a highest class robot that doesnt have an main purpose? )