Without NATO more countries than Ukraine and Georgia would be at risk of war with Russia.

Russia is not going to ally with the US against China even if we let them rape and murder Ukraine to their black hearts content. They want to dominate Europe and share the values of our authoritarian adversaries.

The sensible thing would be to bleed Russia to death. Regardless of whether they manage to hold on to some part of Ukraine for a while, Russia's ability to threaten their other neighbors and project conventional power beyond their borders is being rapidly, irreversibly ground down. Their low birth rate, and declines in their educational system and industrial base, are going to take them off the board as significant players for decades. Most of their major infrastructure and industrial plant is either a remnant of Soviet times or was built largely by foreign experts who have now left for good; there just aren't many young Russians left who still know how to build anything.

Russia has nothing that we need. China can be contained without any help from Russia. China isn't self sufficient in energy or food, and are facing their own demographic time bomb. So it's enough to keep them bottled up behind the first island chain and prevent them from securing their sea lines of communication. Keep the pressure on and eventually they'll have another revolution or civil war; those have been a frequent occurrence throughout Chinese history. As for India, sure let's have good relations with them but they're going to pursue their own interests and have zero interest in being sucked into some kind of entangling alliance.