Wow I seem to play really different from everyone else. Ignore the turks, yes they'll declare war on you but their Horse Archers are useless at attacking settlements and I've always found it easy to defeat their armies and get a generous ceasefire. Main purpose is to keep them as a buffer against Mongols and Timurids. Immediately go for Venice, if you let them develop they'll become a power house and be able to field a strong navy (also their early game armies are pretty much infantry Can anyone say Varidotai) . After Venice Hungary is next. Attack from Venice, wait till he brings his army over and start attacking from constantinople. Once theyre gone your pretty much set. You have alot of rich cities and the perfect place to expand pretty much anywhere.