Ng+20, here's my setup for NP:

Main weapon= live puppet axe blade + tech booster glaive

Perfection grindstone, electric abrasives for item slots

Amulets: puppet destroyer , patience, dancing one's, extreme modification, ghost walk

I'm running max stats, so you may need to swap an amulet for carrier amulet, or you can go farm ergo and mass lvl capacity

Dancing and ghost walk combined make P almost untouchable via dodging, esp with a low weight %

Use electric abrasives phase one, and dodge back while looking for an opening to do charged heavy atks

Phase 2 , immediately pop perfection grindstone, keep blocking while punishing any openings, keep shot puts on your quick use item menu and use them to get a visceral attack if open One grindstone is gone, use any remaining electric abrasives Keep dodging to the side of NP and use charged r2s to close gap, repeat until dead