Give Ukraine rockets to attack all of Russian oil revenue. Then they can't fund it anymore.

Russia also sells oil below profitable internally and to friendly countries to keep them happy.

So you don't need to destroy them all of the time. Their oil companies are already non profitable.

The main problem here is that the US doesn't want oil prices to rise and that's why it's barely done by Ukraine.

https://www.themoscowtimes.com/2024/09/27/gazprom-drops-from...

The economy is on the brink of disaster, it's almost all war fueled now. Russian military capacity is evading day by day ( tanks, men, ... ). It won't be a threat to NATO anymore in 2-3 years, if it's funded by domestic means ofc.

Putin won't attack with nucleair missles. The problems would increase a lot ( eg. Because of the nuclear assured destruction, china would stop immediately helping Russia).

Probably Russia would collapse further like in 1991.