User blog comment:Ein Inferno/NP Damage Comparisons/@comment-5623168-20180122045051/@comment-28242634-20180122053018

Melt has passive Quick +8% buff, and Goddess Essence, which can can count as 1-2% attack buff, so it's near 70% in total.

Musashi's fifth form doesn't affect her NP AFAIK, so it's just Buster + NP damage.