Well things have certainly got interesting. After a period of peace and dealing with Swedish rebellions, Sweden was ultimately destroyed by a Norwegian uprising, so now Norway has replaced Sweden on the map. After all that I declared war on Poland-Lithuiania, though after Hanover finally conquered Saxony. The first thing I did was take West Prussia and unite my disparate territories. Then I moved my armies from Scandinavia to Europe and launched an offensive on Baravia and Prague, both Polish occupied, and conquered Poland-Lithuiania's western territories. Austria was fortunately able to retake Vienna and a couple other territories, so Poland-Lithuiania was mostly reduced back to its former territory. During all this I made alliances with Britain, Austria, Hanover, Ottoman Empire and the Dutch who were all also at war with Poland-Lithuiania. I've also made trade agreements with them and many other nations, so I'm able to maintain multiple large armies and a large fleet.
However Poland-Lithuiania didn't remain idle. They launched multiple raids into my territories, and while they all died, I've still had to spend hundreds on repairs. At one point they captured East Prussia and laid siege to West Prussia, but fortunately West Prussia was saved and East Prussia retaken. Wesphalia and Wurttemburg made the mistake of declaring war on me, so after much bloodshed I conquered Westphalia and am currently laying siege to Wurttemburg. During this entire time I managed to get one of my Generals to a nine-star level, and he has brought me many victories.