I'm assuming your last point was not serious. (I seriously hope so, anyway.)
What, then, would be your preferred solution? What kind of compromise do you suggest, and how would you expect to sell that to Ukraine?
My
preferred solution is some sort of diplomatic-intelligence arrangement with some faction close to Putin, that has a vested interest in ousting Putin, withdrawing from Ukraine, licking their wounds, and living to try again some other day - a day that will likely never come, or in any case won't come soon enough to prevent us from working out some other better long term outcome.
However, if we're confident that Putin and his cronies won't resort to nukes no matter how hard they are pressed in Ukraine, or how thoroughly they are driven from the country, then why
not escalate right now, and get this over with right now? Why do Ukrainians have to keep fighting and dying, week after week, month after month, while we trickle in our leftovers and hand-me-downs?
On the other hand, if we're seriously concerned that we could at some point push Putin into a nuclear corner, by continued progress in liberating Ukraine, then I would "prefer" something like this:
* Having figured out more or less where Putin's breaking point is likely to be, and
* Being reasonable certain that point has been or soon will be reached,
* Offer him some amount of territory already occupied (Crimea, for example), and
* Some reduction of sanctions and some renunciation of war crimes prosecutions;
* In exchange for cessation of hostilities, renunciation of further claims in Ukraine, and repatriation of all the kidnapped Ukrainians.
ETA: As for selling it to Ukraine, that part is obvious.