It was an interesting last session for me. I knew I was basicly doomed, but I wanted to see how far I could stretch my country's abilities for the endgame. Won a "war" on France at the beginning, getting three german provs and helping NL get 2, and then DOW'd Austria a couple years later. The battles against Austrian forces were really unlucky, losing with a numerical and leader advantage in Vienna three times costing about 120k total. Finally Blucher came in from the north and ended their resistence, resulting in peace.
Tonio DOW'd about a year later, which wasn't enough time to prepare all my defenses, but I still had about 500k standing and my fleet was strong enough to hold the Baltic. About 70k in my MP pool. Russia invaded from the east, then had its supply cut and lost lots of troops to attrition. But Tonio had enough men that it didn't matter too much. I was going to ambush Suvorov a couple of times with my main 800 cannon/160k inf army, but always lost too many troops on the fire phase against his 160 cannons/150kish infantry army. Attrition did most of the damage.
Russia used MA in Austria to flank me. Had it not had this ability, I could've targeted his reinforcement armies more easily with Bulow. I won a few battles in the Baltic, and kept supply closed anyway for a while. I had an 80k army behind Russia's frontline, which was around Neumark. My 80k army was eventually defeated by one of Russia's good random leaders(what was it, 5 shock/fire?).
England joined the war, but my NL ally helped me out and distracted him enough that he was never able to actually help Russia(or chose not to). NL fought a very good war, almost defeating England despite disadvantages in naval control, leadership, money and manpower.
Russia pushed me back from Berlin after it regained supply, and then Denmark joined. I had 200k in the west under a 564(modified) leader, so it wasn't a problem. My west army defeated the Danes once inflicting major casualties, then joined the fight in the east. After about a year, Denmark decided it'd be good to destroy my fleet, and finally did so. With both sides using their navies to drop troops on my north coastal provs and both bringin in lots and lots of troops, I was slowly pushed back. After my main MP centers around Berlin, Brandenburg, Neumark, Mecklenburg and Holstien were taken, I was at too much of a disadvantage to hold and the war became a rout, so I accepted the stabhits.
France meanwhile had DOW'd Austria. It was a kind gesture of Cheech to DOW Austria instead of Prussia. I suspect he didn't want Russia to win the game so easily, though, and Austria should've been an easy target for him anyway. And it was, but of course the Russian mob ganged France, putting it in a lot of trouble. The Russian mob being Denmark and England. Since I had a truce now with Russia, I thought I could DOW Austria to help France conclude that war and gain an alliance with France. After I did so, Tonio broke the truce though and invaded again with his hordes.
Russia and Austria got lucky that the OE sub disappeared, otherwise t would've probably had Ottoman troops to deal with. 600k on the border or not, it would've been a distraction, dividing Tonio's attention and his leaders. I should've insisted on a rehost when Hal turned up again.
Before Russia DOW'd, I attacked Karl in Vienna and after a couple battles pursuing him, reduced his army from 200k to about 20k before he escaped to Venice. Then my remaining 100k marched north to counter the Danes who were now pressing me again. Blucher fought Russia in Poland, and then had to retreat.
I think again that I could've held Russia if it hadn't been for Denmark. Not that Danish armies were very powerful- I had the most success against them, annhilating one army and very badly beating them in a lot of other battles. They forced me to keep my forces divided though and drained a lot of my troops in those battles.
Not gonna go into detail on the 2nd war, because it went a lot similar to the first. Russia slowly gained ground, had its supply cut now and then, but Tonio didn't make any mistakes that would let me kill his leaders, so even after Suvorov died historically, his two 5 shock/fire(6 modified) leaders were able to keep fighting almost as successfully, and after 4-5 years Prussia was defeated utterly, having to cede lots of land to DK as shown in Tonios screenshot and having the country completely occupied by Russia.
I think if I got to fight a 1v1 with Russia, the Russians wouldn't have broken through. Especially if I'd had a full MP pool and standing army. Neither of the wars were remotely even, but it gave me a chance to see how far I could push my country, and it was fun in spite of its ending.