honestly want to know if either team would do this

Not for a rental winger

Even with an extension,
it’s pretty rare for a team to part with a top10 pick

Probably no from the Devils, FW is the last position they need to spend big for.

It not rare. About 3 of every five draft classes have one traded top 10 pick. Granted, not all of those trade downs, but it happens more often than not. But only one, always one. I think you'd have to go back pre-cap to find a year with more than one.

It seems like a weird thing for the Devils to do, and I have no idea what Army would say.