If you look at the tables for turrets, most, but not all, at high number of weapons increase one USP for about 50% increase in weapons. Continue this trend and deploy fewer batteries of many more turrets per battery then 10. It should be possible to to do something similar with bays.
I haven't had a chance to fit curves through the tables, but I would like to. 102 beam lasers in one battery (34 triple turrets) would at TL 13+ would be USP factor C, but one roll of the dice sure beat 3 when you're fighting with Dreadnoughts.