It almost seems like a waste of ammo to fire them all at once. In space there is nothing stopping him from keeping the covers open and then firing successive salvos at various targets. You know the whole "Death Blossom" maneuver...
Quick note to MarchusMaximux.
I was browsing the MMM and noticed that the Full Barrier system would explode when overloaded.
IIRC, by 2045 the system would just shut down if overloaded. I would have to double check, but I believe that ep 49 of M7, showed the Full Barrier of the City 7 beginning to fail as opposed to exploding like it did in SDFM.
Just something that may need to be looked into.