The war wouldn't be that hard to win without rewarding Russia.
1) Send enough resources to form an iron clad defensive wall in Ukraine that annihilates anything that crosses it.
2) Insist that EU partners contribute a proportional degree of resources to make it "even". Negotiate that we won't commit until they step up.
3) Give Russia a timeline to get out of their captured areas of Ukraine with the condition that if they don't, they will be annihilated and sent the bill for any collateral damage on Ukrainian land.
4) Don't be bluffing, but neither step over into Russian territory either as that would spark an existential desperate response that could include nukes.
Russia would become a docile lap puppy in no time.
Who is buying Russian energy?