I beat him on my 2nd try :(That's insane! Grats! I can't imagine you beating it on your first try. I wonder what your entire load out was to not find him difficult. I thought he's shockingly hard compared to everything else in the game.
I actually don't find him too difficult. His moveset is pretty readable, and I can tell what's happening on my screen. He just tanks a lot of damage and hits really hard. He also spawns adds, which is actually one of the harder aspects of the fight. I felt badass when I beat him because I was skillfully dodging all his moves.
The clocktower boss... I have no idea what's happening on my screen for the final phase. I just try to tank through all the nonsense and DPS her down. Not a difficult fight, but I really dislike it.