Need to help end it quickly. The longer this drags out the greater the risk of nuclear escalation.
I don't think that at the moment there is a real risk of a nuclear escalation. Russian read lines are very "elastic" and it is quite obvious that it has a very defensive posture, and to say "defensive" is quite euphemistic. It is seems the first time ever that a Country started an invasion just to have a defensive posture, with the invaded one that is the only one that makes offensive operations. The opinion I have formed is that Russia actually doesn't know at all about what to do. It acts like a person who doen't know what to do about his life and hence he limits his action only on what it is surely not-wrong, like eating, doing some sport, without any kind of planning toward an objective. Russia knows that there is a weapon storage? Then it hits it, but then? A missile strikes Belgorod? Then it stikes back a missile on Kiev, but then? It makes only reactions against actions, like an automatic reflex.
So, like any person who fails to undestand what to do about his like, Russian hope is likely to be that the time will "give the answer". Ukraine, as to say NATO, has took advantage from this inconclusiveness, by now absolutely undeniable: any kind of threats of retaliation has been proved to be complete blufs. Prigozin has said nothing but the true. So, I think that any kind of weapon will be finally given to Ukraine, even nukes. Ukraine is already practically a NATO member and if this war will arrive to a kind of long cease-fire, Russia will have not other choices except to accept the fact. If it has not took the initiative until now, it will no take the initiave now, when it is much more difficult then before. So, if Ukraine doesn't make something very very crazy in order to legitimate a nuclear responce (and I find difficult to make an example), I don't think that Russia could on the blue go nuclear. I think that there is no risk even for Crimea. For example: if Ukraine destroys the Kerch bridge, could Russia go nuclear for that? I doubt. In order to go nculear, Ukraine should make a massive strategic offensive toward Crimea, beating off any kind of defence. I don't think it is able to do that, but it is not necessary: it is enough to destroy the bridge and make pressure on the borders or a little beyond the borders.
Finally, at the moment I don't see in Russia any sign to change its posture.