To me actually the cigar on expert is the hardest or at least the one that I feel less comfortable against to. Haha now that I think about it, I believe almost every boss is simple. And yet, this is the first time since the game came out that it's been left un-played for over a day. And I know that if I practice and practice and practice, I'll eventually get it. I know that this is mostly because I need to git gud. However, even when I do get to King Dice with a couple of HP left, those cards I mentioned earlier. Now I'm naturally gonna make a few mistakes when I do finally make it to King Dice himself, since the hit boxes on the cards seem to be erratic as hell, so I inevitably end up resetting the level over and over until the hearts are on 2, 4, and 8 or 9, the levels I can do pretty well. However, if I have the automatic parry enabled, I can't have the health upgrade enabled, so I start with only three HP. And I've always felt like I have a good sense of timing and rhythm for the life of me I cannot roll the dice the way I want to without the automatic parry. I got through every mausoleum on my first try. I had never played a single run 'n' gun game before this and I had heard how difficult it was, so I was a little intimidated at first, but the game made me feel powerful and badass in a way that most games don't.
I had been loving the game up until I got to the King Dice battle.