The deal should be...
All Russian troops get pulled out of Ukraine. Ukraine gets a lump sum of all seized Russian assets in foreign nations, Russia agrees not to move troops within 100 miles of Ukraine's border without Ukraine's consent. Ukraine agrees to allow and even assist civillain Russian services with locating and returning living and deceased Russians.
The alternative is we take the limits off of what targets can be attacked within Russia, and enable Ukraine to enforce the conditions as proposed.
I'd also like to add that Russia and the US give up their UN "super veto" power. I don't think anything good and effective can come from the UN when a single country can just "nope" any UN proposals.
Veto power in the UN is a short for "we will use nukes if you do this". The UN is not world government, it's the organisation which task(among many less important things) is to prevent nuclear war.