Couldn't you just fly low so that you'd be within the energy weapon's dead zone? I mean it doesn't look as if it can target anything flying at a depression less than 0°. Seems a few cheap fiber optic drones with a mortar lazily strapped to it and flying low could easily render this useless.

Or swarm it from 6 directions at sub 0° depression.

I'd love to know how this isn't blinding everyone in the area tasked with operating and protecting this system.