Disclaimer: I have no idea if this can work, probably it won't, but this is a thought that just hit me
Let's see.. we have a parent building (generator) and firing buildings/overlays (FS walls). The problem is that FS uses charge drain logic. If we skip that, we can use Psycho's great fake superweapons, making the firestorm firing anim into wall's superweapon firing anim, then it would be active for as long as the animation lasts. Pf course, the superweapon should be attached to the wall sections, not the generator. However, the problem is I highly doubt that
all the wall sections will fire the anim... And the charge drain problem still stands... Anyway, I think this has been proven before, you can't make a real FS defense in RA2. Although charge drain logic still works.