Putin is working as hard as he can to develop methods to increase Russian abilities without using nukes... more powerful and capable missiles, for example. After all, he doesn't want any nuclear fallout blowing into Russia.
No! He's working hard to make sure the war between themselves comes to an end quick. The two things that will happen from this war would be Russia achieving their aim, retrieving these lands which belongs to them ( formerly Russian lands ) either by military drills or massive surrender. Only dump politicians like these European leaders would want to see their nation burn down because they're obsessed with Russia. Putin has no such plans for nukes!!!