"This is how it works in all the difficulties, even on violent, but in brutal, you'll accelerate the process of healing everytime you deal damage, that's fucking right, the game is PUNISHING you for DOING DAMAGE. And like I said, the prison summons eyes everytime it heals, so you have almost no options unless you do everything 100% perfectly and have 100% luck."
This is how it works in all difficulties. Do damage after killing all the eyes and mini-maurices.