1) At start of game send fleet to sea, jump on with your troops. Sail to coast near Epirus, attack them asap. Than you desant Epirus first, you will be in charge of siege before Naples do it.
2) Conquere minor Turk states. Keep all the time build fleet.
3) Dont attack OTTOMANS! They are your buffor so the hordes dont eat your lands to early.
4) Set slider to max minting to get fast some money. Dont worry about inflation untill its before 7-8%.
5) Than you accumulate money start rebels in Rhodos, Crete, Cyprus, Athens, Naxos, Achea, Corfu. More lands = more money = more manpower = larger army.
6) If some horde border you, try to make peace with pay tribute. Its waste of time to fight this bloobs than other can do that.
7) Than you have pay tribute to Golden Horde, and Timurids, eventually Quara. Its time to kick Ottomans.
8) Untill that time you should have enought fleet to kick ass Ottoman, and block passage from Anatoly. Start rebels in Greece and occupy Bulgarian lands. Wait than all rebels pass to you.
9) Again more more money and bigger army to set. Time to take care Asia Minor.
10) Wait than hordes start falling to take they lands.