I would add respecting the Russian Church in Ukraine as well and restoring its holdings, and perhaps independently monitored (not EU, but EU + China + India + Brazil maybe) referenda in the Kharkov, Nikolaev, Odessa and Dnepropetrovsk regions on whether they want to stay in Ukraine or join Russia.

THEN, you present the following plan:

1) Totally demilitarized Ukraine
2) Limits on Russian forces, especially missile/anti-missile assets, in Belorussia
3) Similar limits on NATO forces in the Baltics and Finland
4) Right of transit for Russia across Poland and Lithuania to Kaliningrad (as existed before the war)

You could then consider Ukraine being protected by a NATO guarantee without being part of NATO formally. This creates a balance of power, limits on activities that threaten one another both on the part of Russia and NATO, and ensures a peaceful future.