Something to keep in mind during the Dark Genie fight is that you can damage the hands with non-elemental attacks. It just does about half the damage, since you’re not hitting the elemental weakness, but it saves time swapping elements and you’re guaranteed to be able to hit whichever hand pops up. I have no advice for the other phases and honestly can’t remember how I beat them. Probably just keeping up the supply of stamina drinks and taking advantage of invulnerability frames from some of the charged attacks.
It was definitely a treat getting to see the end of the game again without having to beat it myself. It was a fun game once through, but on a replay, it definitely helps to stream it with guests who can come up with things to talk about and on-the-fly name ideas.