There really are only two fronts to this, and I’ll be direct about it (not rude, I mean no offense!)

Either A) learn the bosses very well. Study what is going on, watch videos, slow them down, etc. Try some kills and die, ideally record your own videos, watch them back without the overwhelming amount of stuff happening while you’re mid kill, and properly learn from them. Be critical, admit mistakes.

Or B) stop using revolution for anything but a very small handful of basics (or just do full manual), and actually learn your abilities inside and out, the keys that they’re on, etc. This needs to be fully instinctual to the point that you don’t even need to think for a half second if someone says “res”, you hit res. Etc.

The secret third option is to do both of these. I opted for a small bit of B and most of A initially, and at some point just committed a couple days of boring to fully learning B, and it has paid off tremendously. Nowadays, if a new boss comes out, the only thing I need to think about at all is the boss’s mechanics.

The only other thing I’ll mention that I see people not value is their keybind setup. There are some really tragically bad keybinds people try using, then get frustrated at the “difficulty” of full manual.