Hi Vashil,
I don't know if this is still an issue for you, but if it is then I have heard some Dommes in the past talk about similar issues. Though it's not possible for you to win against him in a fair fight, there's no rule that says the fight has to be fair. If he wants to be overpowered then presumably he'll be willing to help you set up a situation in which he is at a disadvantage such that you can take him down.

The most obvious way to go about that would be to start the scene with his hands cuffed behind his back. That would give you a clear advantage while still allowing him to feel like he was struggling. Other potential additions to the equation could be a blindfold or hood, hobbles, a neck chain, etc. You could start with a crop or other small (non-electric) weapon.

Remember it doesn't have to be 100% "real" to be satisfying to both of you. Don't be afraid to set up a scene in a way that will allow you to both get the outcome you want, so long as it's safe.