I like the backstage matches and they would probably make more sense, but in rign matches is what is exciting about wrestling/tickling. That is what would separate it from all the other tickling producers because it is during an "athletic" competition. Not your typical "tie them up and tickle them" clips that so many producers use.
Very Tough question - My answer would to ringdivas would be both. Experiment with them and see what happens. In the ring makes it more competitiive, however Backstage dominance is brill too. Either way not that fussed.