There is something called concentration/saturation: one matter is 1 fighter per bomber and another matter is 10 fighters per bomber. So, in reality, kills are nonlinear. In my opinion a game that doesn't allow this it is unrealistic/broken.You seem to be presuming the bombers would get hit harder by passing through e.g. 5 zones with 200 interceptors in each, vs going through initial zone with 1000 interceptors? Not sure why you'd think that'd be the case; maybe if damage output wasn't linear, but there's no reason for it not to be.