Dude Russia won't even be a global player in 25 years. Their demographis are a disaster, their population is going to take a plunge like Europe, and even worse for them the young people they do have are riddled with tuberculosis, HIV, alcoholism, and worst of all are rather uneducated to compete in the 21st century. Their Soviet era experts in nuclear power, computer science, military science, etc are nearing retirement age and they disbanded their training/education regimen in the 1980s that would have filled those positions.
Take a look at Russia's future:
Russia is trying to secure their territory now before that reality hits them. The US would have to block this new found aggression for a decade and then they are toast forever. That's the reality. It's not a ship you want to jump on, because it hit an iceberg 25 years ago and has been sinking ever since.
They can't even get on the fracking bandwagon because their shale is under permafrost and isolated from civilization. They are a classic petrostate and low oil prices are crushing them. This is not an economy you want to buddy up with going into the next century.
Iran on the other hand
isn't a sinking ship. They're poised to dominate the Persian Gulf region. They are the most diversified economy in the region, with superior education and military and thankfully for us their young people sorta want Westernization.
Unlike Saudi Arabia, they haven't been funding Wahabism/Salafism for decades and oppose Sunni extremists like the Taliban/ISIS/etc. Unlike Saudi Arabia, their domestic instability isn't to become an extremist Islamic state, it's to liberalize and move away from Theocracy. And unlike Saudi Arabia, they are prepared to succeed in a post-oil world.
If anything we should be trying to continue speaking with Iran to pull a Nixon and get them out of Soviet orbit and further isolate Putin and his oligarchs. That massive Iranian gamechanger of people aged 20-35 are the hearts and minds we need to win over because they will soon have a great deal of political power in that country and can undo what happened in 1979.
And China, well it's fucking China and they're here to stay. Crossing China so we can be friends with a dying Russia is so god damn silly I don't know what to say. It's being needlessly antagonistic to our largest trading partner and really the only country on the planet that even could challenge US domination fifty years from now.