One idea I have in mind right now is to start tickling the armpits or the feet of a model and make her beg you to tickle the other spot and then vice versa.
Or you could tickle each spot for let's say 5 minutes and then have the model to decide which area is most ticklish. Then have this area mercilesly tickled until the victim is forced to kiss the feet of the tickler (to please foot guys).
About the bondage, I think it has to be really tight as these spots require total immobility. The tickler can be either a female (a turn-on for most males) or a male (the same but for most females). I wouldn't like to see bored-to-death ticklers, semi-ticklish models, tickling techniques like "digging in the chest" (How on earth could that tickle? Is our heart or lungs ticklish?) or "squeezing the soles". I prefer to see action, passion, laughter, sadism in the eyes of the tickler. I mean, look at Priscilla James, or the girls of Tickle Abuse. They enjoy tickling their victims. I'll come back with other ideas and suggestions if you find these useful. 🙂