From my experience with bosses I'm pretty sure I did struggle with the first boss due to lack of resources I could prepare myself with. The second boss I prepared,monster weapons,items and movement, utility, and other skills in case things went of hand. I didn't really encounter the third boss Until I did the floors Multiple times due how I was collecting rings,resources for powerful weapons, and items from the statue.When I did encounter the boss it was somewhat underwhelming to say the least, especially when I wasn't even fully prepared when I fought the boss. In all the boss fights I was in I'm pretty sure I never really used wind armor.