They should do exactly the opposite of whatever they are doing now.
This is not about Ukraine, but it`s about Russia. They are doing everything possible to weaken Russia (which was their plan all along) and to be honest they are succeeding in it. Since they are weaking Russia, the consequences for Ukraine will be even more severe. After this Ukraine will be devastated, Russia will be weakened and Europe will be on it`s knees. By imposing sanctions to Russia, Europe is imposing sanctions to itself since they are dependable on Russia.
Russia will come out wounded but still find a way to survive this, as they will start trading and do more import/export from/to China, India, Pakistan, Syria, Iran, Iraq, Brazil, Venezuela, Argentina etc.
But Ukraine will be a post war battlefield after this.
Nato, EU and western powers should act as intermediaries between Russia and Ukraine and stop this as soon as possible because more people will die and the whole world is suffering.
Throughout the previous century European leaders proved to be inadequate and incapable as they somehow allowed the two World Wars to happen on European Soil.
We are still early in the new century and they are proving once again that they are incapable and inadequate of foreseeing and preventing this to happen on European soil for third time in a row.
The good thing is that there is still time to stop this before the bear goes into berserk mode.
The bad thing is they chose the wrong approach.