You could definitely apply to FromSoftware to design their bosses. I felt the same frustration of Bloodbourne bosses ;D
I eventually managed to defeat him, even if we basically died at the same time so the die and success pages overlapped one over the other and I couldn't read what I achieved.
Art is so good. It's Thomas Brush's style but well executed. Try adding something yours in order to make it more personal!
Good game, nice mechanic!