I used very similar strategy to zlewik's video. Taking espionage is very op however you should take all of HRE at one war which I didn't that's why ıt became harder. At first you should wait for espionage AE reduction to attack Serbia and Bosnia. Other than that release vassals in a cobelligerent nations then diplo-vassalize them. Monuments and fall of Wien events are crucial for later(truce break phase)Congratulations! How did you do it?
No I didn't. And you don't have to do it as well. I didn't use any exploits. I don't like exploits.Did you use religion shifts to bumb relations with muslims?