Ambient darkness ramps damage as torches go out - expect increasing pressure even if you ignore re-lighting
Torches: squads often heal through darkness instead of re-lighting, but breaking bars & dodging leaps are mandatory
Stack on commander (melee); all dodge in the same direction (left) when boss raises its right arm
Break the defiance bar to prevent a scream that knocks back and extinguishes torches
Dodge the leap attack and cleave down any adds that spawn