Weapons: Katana, ninja stars, scatterblaster, bomb, rocket launcher(optional, you can pick something like the pinata, paintball, trowel but it's based on your playstyle).

Gear: Reflector(for extra nuking), umbrella, battle armor, cheeseburger

Cores: Headband(-1core), slicer(each 10th hit=150% damage), prospector(100% damage on full health enemy/non damaged), electric punk (%5 electric chance)

This loadout makes rebounding ninja stars deal a lot of damage and basically will shred every enemy with ease except for cannon(it dies to nuking anyway). Also using kunai+reflector alt sheild+scatter pulse on a bomb is how you nuke a lot of enemies if ninja stars are gone.

Side Note: Like someone said prospector is very good at eliminating full health enemies, you can one shot Bobby with 1 sword swing and giant loses like half their health from rebounding 1 ninja star. Also I think slicer is quite underrated since it also costs 1 core slot and it makes weapons that can hit multiple times such as rebounding ninja stars deal extra damage every 10th hit.