So, you feel that if the wheel spins, that will soften the blow the extra power is delivering to the drivetrain? I'll accept that, but, it won't eliminate it.
Speaking of super sticky tire ... are you still running the factory rear tire dimensions? Or, have you change them it out?
I run 295-30-20.
And I have the worst tires in the world. TOYO proxy plus4
They make the Kenda look like a super sticky drag tire.
I wouldn't worry about the final drive. It hasn't been shattered yet by power.