I would wave land on the platform and tech chase with a grab. If they roll left or get up straight, I would do up throw to forward smash since it combos at 50%. If they rolled towards the middle than chances are they would di the up throw towards the center of the stage, in which case an f smash wouldn't combo. I would end up jumping after him and shining in the scenario.
Or I might stay under the platform, and catch him as he rises with a jumping shine. After the shine I would waveland onto the same platform and try to combo him from there.
I like this thread. We should make this a game. Somebody else post a situation to see what every one else would do.
Oh, and here is what I would do if Jiggs missed a rest at 0%. The best thing I can think of is d air to back throw, and try to combo a shuffle n air after the b throw. If I was feeling cool, I would do a d air, then a short hop d air and land behind the jiggs, then try and turn around and grab, assuming that they put their shield up right away.