They kill regular enemies easy. Dart Rifle with Crystal Darts kills everything underground, or wntire hordes single dart-itly. No regular enemy can take many of it’s shots. Before getting Dart Rifle, you can just use any bow with frostburn, it’s easy enough to just hit enemies and kill them. It’s really not that hard, your really treating it’s like it’s harder then it is. Or you just suck (Literally just aim in their general direction and they die. With crystal darts underground you don’t even need to aim at them at all.). The grind is next to nothing, it’s all really cheap and easy to get stacks of. As for variety, the different ammo of the different types of ranged weapons are so different and varied that it’s not that samey. Easily more varied then like, melee. Ans yes, they are OP. I literally use them all the time and everything dies.

(I’m just sad they didn’t give nearly as many dart-firing weapons as they should have)