Hundreds of methods Each one has his / her own method that works better! And one can always explore new ways to work up locked cocks
Careful with the magic wand. It can take you OVER the edge. That was my last orgasm actually - unauthorized, caged, with the magic wand. I was experimenting with it - had just bought it, and could not stop myself. My wife is not letting me forget that. That was 33 days ago.
If you want to edge that implies stimulation that could make you climax. Vibrators work for me. We gotta keep our hitachi in a safe. With the Hitachi, she could definitely do a number on me while in my cage. Maybe electrical stimulation. I have not played with that for a while and it never got me close to climax. Might work for someone. If there are many methods to edge in a cage then the cage is not very effective. Now, if you are just talking about teasing... I've found fingers through the bars very effective. I swell up and bulge out making access easer. Never going to edge me but sure gets me want more.