We engage the Ottoman troops in Edirne.
The Ottoman fleet gets sunk another time...
while the Serbian army is routed in Serbia.
Ottoman troops are defeated in Edirne.
... and are routed in Nis.
The blanket of doom spreads over Serbia and the the Ottoman empire.
And after Serbia falls, we can vassalize it and therefore burn 2 infamy.
The next mission will be finish the war with the Ottomans and still hold Crete. Easy enough. We'll lose another infamy point.
Nothing else is to be gained from this war. We have no casus belli against the Ottomans and grabbing provinces would cost us too much infamy.
We white peace and so the next mission is fulfilled. We get another , incorporate Tuscany in our realm. Another very good and easy mission. We'll get a core on Modena.