Give them Novas instead of snacs with 5 shots ammo or so.
It's not the no energy limit, it's just that they are hard to balance in respect to other NPCs and not to give them too much firepower and armor. It's just a lot more work. Plus I have to make custom NPC-only versions of fighter weapons that can be fit into bomber gun slots.
I only do that when necessary, like for the FA NPCs, who use Mamorus escorted by civilian class ships, as they have no fighter of their own. (And I'm trying to avoid doing tech sharing between NPCs, which is why FA don't use Hogosha Black Dragons, and Bundschuh don't use Hessians ships.)