How to detonate ball lightning mines efficiently and nuke down bosses and metamorphs

0:19 Initial Setup 1:12 End of invulnerability phase setup Watch the setup at the beginning of the fight and at the end of his invulnerability phase. Throw down 23 mines, hit detonate as soon as boss becomes active. Flame dash and wave of conviction, hit flasks. Keep tossing mines until chain ends and repeat. Avoid throw/detonate/throw/detonate unless you are just clearing trash mobs - if you do this you will get no damage.