I dont see MINIGUN here. Its useless weapon. No one use minigun, only avanger minigun.
If you want to make enemies, try to change something.
You could always go for different kinds of ammunition, for shotguns for example. In my mod, I've made beanbag rounds for example, it gives the target a high bonus to it's DR check so the shot does little to no damage, but has the knockback perk added for great manstopping. Basically, there is a need for new weapon perks, ammo modifiers to make the weapons more varied in use IMO. This is atleast how I handled it in my mod, so you may call bullshit if you want.
I like the idea, but max hit chance for above normal range should be lowered under 95%, or players will manage to get 95% hit chance even above normal range.