Vyjanagar or what ever it's called is a nice option. Grab all of India before the Europeans come to spoil your work

Also, for an African empire, one cannot forget Morroco and Oman. Also, if you can break the landlock with the uzbeks you might want to start working on siberia once you get landtech 31 or, by some freakish accident, a conquistador :rofl:
If you'd like a Siberian adventure, you can conquer the uzbeks with one of other mongol states while going free trade/narrowminded (or even naval if you want to kick yourself in the groin) and, again, work Siberia up. This can also be done with Poland/Poland-Lithuania but it might take longer to conquer your way to Siberia than to reach land 31... dont forget, the krauts and the ruski's also hate you
And then there's also china, which can get siberia from the other end, but china's economy is unbreakable so any human player with china generally owns big time anyway. Only another human with a reasonably strong country (aka Castille/Spain, France, England) can put up a fight.