At what Persian level did you pass the first boss? (Rogue Legacy 2)

Constantly seeing a window with "A controller is better for this game" when entering the game, I decided to take it and chose Rogue Legacy 2 as the starting point for turning my claws into the hands of the controller master (first played 50 hours, reached the new game ++ ). But after two attempts to overwhelm the first boss at levels 45-48, he began to doubt his skills and leveling the skill tree (he played 5-6 hours). Am I the only one or has everyone had problems with it?