My preferences
First, allow me to say that tickling by democracy is a splendid idea. That said, for the first shoot I'd go with keeping your lovely wife clothed so that all can enjoy the clip (as some of us shy away from the nude stuff). Just make sure she is very securely tied but comfortable, go slow, let us see her face and soles and tickle with gusto! As for the other considerations, if the tickling is true and good, it won't matter. Good luck!
Cheers,
Meth