Jungle Japes has a lot of things going for it. First off, no character is more mobile there than Falco is. He can be camping from one position, and a second later is way away camping again. Learn all the phantasm stuff, just don't spam it. It all has a time and a place.
The stage is amazing for laser camping, this is something you just have to develop on your own.
The high ceiling is really good because Falco is deceptively light. The bottom is also really low, which is good for Falco because your vertical recovery is terrible anyways, and it super gimps most peoples recoveries.
The center platform gets owned by chain grabs, and can zero-death a lot of characters foolish enough to let you get it on them.
For some reason, I really like Castle Siege. I don't know how to explain it, but it's just a good Falco stage.