As a member of the far-left, I think we're more into disintegration of the US as a priority. The EU people are far more likely to peacefully transition into the democratic communist system, since it is not as heavily propagandised against as in the US, or Russia.

China I'm not sure about, but since their industrial base is moving towards climate sustainability, we should let them keep doing that until we similarly change the US economic system. EU is also a great centre for climate sustainability research and tech, but the politics are not there yet.

Edit: Oh, and Russia is a fucking Mafia state and is in no way aligned with leftist goals. Remember that the essence of the left is to advance the interests of the working class, and Russia is feeding its workers into a fire in a war Putin chose.