The instructions for part 2 are missing info about how to handle the Four Of A Kind and a joker case. Wasted quite some time because I assumed that the remaining joker would remain unused, but turns out it turns your deck into Five Of A Kind.
Did everybody else just expect this?
For part 2, the only thing that I missed at first was the JJJJJ edge case. My approach was:
Last step fails if there are no other cards left after you remove the jokers…