I am using Veritas et Fortitudo - most of the gameplay is overhauled, more complex/detailed, more provinces, more buildings, more ideas, more religions, more mechanics. 10/10 mod, i enjoyed vanilla but afther this i think its bland
Coro and Koyote dynamic HRE - Nations can add/remove provinces to the HRE depending on the relation with the Emperor
Formable Nations Galore - more formable nations
Music: The German Empire
Expanded advisors: more diverse advisor options
Spectres HRE flags and Viriathus Italian flags
Dat Riga!
Yea, Muscovy strugling to form Russia can lead to some strange things.