Agreed, but I don't think the question is whether or not he could do live magic for 30 minutes with the rules listed, but whether he could perform effects as impressive as levitating from building to building.
Anthony Bass
If we're talking sheer bombast, levitating from one building to another is just a drop in the bucket.
Actually The Asshat and Cyril both do magic you could only do with certain set ups and helpers to a degree. (Cyril not as much from what I have seen) They all use specially built props and situations you couldn't do "Impromptu"
Cyril has more stage background than David. So yes, he does use a lot of unique set-ups. However, he and David both really cut their teeth working close-up.
With that in mind, I'd say at any given time you can probably guess it's about equally divided between elaborate set-ups, and the entirely self-contained.