St. Petersburg is another story. Muscowy isn't as dominant as it used to be and while they have more troops, I have the technological edge over them.
About the Swedes, I'm waiting for some vassalize casus belli mission to pop up.
P.S. I also need to take it easy as you probably know at every monarch death every non cored possession goes all Golden Horde on me. And I have tons of non cored possessions.