Internal: 1x1000kg or 2x500kg or 4x250kg or 9x100kg
External: 2x1000kg or 2x500kg or 2x250kg
I don't even think it would have to be perked with formations. 310 on the deck is still much slower than the most common MA fighters, and the defensive armament is significantly hampered by a very short firing time.
But I still agree: Rather lightly perked than being inconsistent.