Thank you so much for the feedback, i've actually gone over a few things to make the game more enjoyable. Aquatic armor is now more resistant to Visage water attacks in second phase, and the fact that you started the fight taking damage was also frustrating so i fixed that, some of the more mean placed enemies are now only present in hard mode which hopefully makes some of the levels feel less crowded, frustrating aspects of the mentioned bosses were also adressed. So i hope that if you have the time you could revisit the game sometime since there is also a final level that is unlocked upon beating the other four.