Executor feels great when you put Seppuku on his starting katana and also use this relic.
Seppuku and r1 on enemy that are weak to bleed. For other enemies have a good weapon ready to swap. Seppuku yourself first for a 20% dmg buff from your passive then swap weapons. The buff lasts 20 seconds and persists through weapon swaps.
Black Knife's weapon art feels great with this, chewed through giga Pest.