I had two ideas for parts of a puzzle that would be possible in reach: 1) There is a long hallway that is a soft killzone (10 seconds and dead). You can not make it to the other side of the hallway in 10 seconds, so you'll need sprint to get to the other side. You can use this to make sure that people drop their other AAs and get sprint at this point or to make them accomplish a task to get sprint 2) This could also be accomplished with a jetpack, except with an instant killzone instead that you have to fly over.
The other way to make it work with Jet Pack is a vertical soft kill zone. Or a vertical chute, I guess.
what if you had a pathway made from the kill zones (instant kill zones) and you had to walk a certain path to get across? sort of like this:
Yeah i had an idea like that^ except it was a soft kill zone and sometimes you had to walk in it for a few seconds to get to the next safe zone.
Very true. You wouldn't even need a killzone then. You could also have a fall where you need to use the jetpack to prevent fall damage. With the vertical chute you could also have it where there is no floor so you need to use a jetpack to get back down too.