Looking around the mod and noticed Qasim, which becomes a vassal of Muscovy in 1452... until 1680! And yes it is as ridiculous as it sounds, you are an OPM Sunni vassal of a very big Russia. You are outnumbered 48 to 1. Although you might be able to get Spain to support your indepence if you improve with them, they still have less troops than Russia, and there's no guarantee they'll be smart enough to actually move them into Russia, nor get them out of the new world.