Dead Cells - Easy Boss Kill Method
As mentioned in my two flawless trophy videos, I changed my tactic towards the end and it yielded incredible results.
The idea is simple. Get two turrets, make your build around them and then use the ice bow to hinder each boss/enemy to make the mode a joke. Normally this would require great RNG but you can limit what you unlock to increase your chances of getting certain items. Once you get all three you can make these fights an absolute joke.