Had record for a while but kept grinding for the sub 18.
Mediocre early bosses, got messed up pretty bad by sisters of battle and elder hu, but most of the later bosses were pretty optimal, so that made it up.
Charms: Unbreakable Strength, Quickslash, Fury of the Fallen, Shaman Stone

Leaderboards: https://www.speedrun.com/hollowknight...