uhmmm, why not to build those structures... INTO each others then....?
i mean, instead of packing them next to each other, you could just add a tube for example to the trapper/egg/barricade/om, et cetera. same for humans, you could advance any structure with a defensive one. for build points of course.
teslarmory, medchinegun turret, barritube, hivel, overhive, boostrapp.
my mind is gone.