just watch some nvd vids from good players
I'd say most important thing is to know when to walk/wsg and when to spear
if you're playin against a defensive dudu that stays offscreen alot just spam some spirits / teeth first to try and get rid of summons then spear him. if he dodged all your initial spam and still has all summons just go offscreen and rinse n repeat
also depends alot on enemy dudu and how often they stomp
general idea of how NvD should be play:
https://youtu.be/FNei-VH2AqMmy fav nvd style (mix of aggro/def):
https://youtu.be/n6wieaRVBGc