I found out the closest hitbox of jab one make the opponent fall from the battlefield platforms making them in a position where they have to tech
it's difficult to pull out on big characters, due to the fact they will probably be hit by the other hitbox
it works at any percent, the bair is probably the best follow up for this setup, but i think you can also platdrop and dsmash, maybe reading the roll
it's might not be THAT hard to pull off the jab in that way during an actual fight i think... plus, you can bait on the platform
pulling of the bair out of it it's a bit tricky, but it's muscle memory: I buffer the turnaround during the first jab, it's easier; then you platdrop and at the same time bair, but that's obvious
here's the concept video
https://youtu.be/uzG8YUEDThk
the music is there because i was listening to it while labbing, coincidentally the finale is hype as duck to me because of it lol