4:24 I think it's worth mentioning that while I was editing the video, somebody found out that you can just M flip into 5H instead to make it hit universally, so I'd suggest you do that instead
Delaying the superdash is important, but the most important part is the slight delay on the airdash after hitting the superdash. The delay is *very* slight, but you have to hit the delay to make it hit. I promise you it's only awkward at first though, and it's completely consistent afterwards (I hit it in game all the time)