Bombs and rockets of course.
Big whoop. Bombs have to be carried by planes that will be illuminated by US AWACs all the way, and interception will be done by NATO integrated air defense systems. Air assets will be pan-Nato, as everything is in range of Poland.
They would have to try suppress dozens of Nato radars and airfields.
And then they will have to try to defend Russian assets, because, by the madness of this scenario, it will mean general war. Thats hundreds of PGM raids on every strategic site in Western Russia.