sparkcharge flamereave build

while farming for shadow rend bd, i found a 3lp battlemage's endeavour and slammed perfectly with a perfect 2h sword so i made a flamereave sparkcharge spell blade build.

The build is currently at 1000 corruption and kill extremely fast.

This build been through 2 previous iteration, one using fire brand and one using mana strike, the damage is there but didn't feel great.
*note: for quality of life i suggest getting a sunwreath ring with precisely +5 mana to flamereave, it does not resolve the mana issue but ease it a bit
https://www.lastepochtools.com/planner/QeY5dmRa