It was so easy taking Brazil. I simply set up my Byz. Guard Archers and Vardariotai around the village and spewed arrows into the town square. I massacred almost 900 out of 1000 defenders without taking a casualty.
And its awesome watching a Dis. Byzantine Lancer in full Kataphrakt armor on foot kill some Native Chieftain.

EDIT: however, in my only major defeat in the entire campaign, a stack of mine at Sarkel which was taking a Rebel castle was set upon by the remnants of the Timurid horde, and completely wiped out. Sarkel was only a motte and bailey so it had no chance of defence. However, I did inflict 50% casualties (2 stacks) before I died. Ive got two other armies in the area (one in Kiev and the other coming up from Tbilisi) so its not a big loss - still raising a replacement though. I probably wont bother taking out the Rus, theyre Orthodox too after all. The Greek Empire extends pretty much over the entire map except for a few Rus regions.
All the original Timurid uber generals have been assassinated or killed in battle, and my assassin keeps killing their more crappy new generals, however ffs, they keep getting new family members, even though I kill a faction leader or heir every other turn. Its really annoying. They never have more than three generals.
The only regions I don't control are:
Helsinki, Riga, Novgorod, Smolensk, Vilnius, Thorn, Halych, Caffa, Ryazan, Moscow - and ever since the disaster at Sarkel - Sarkel.
(I don't know what the regions of the New World are in total)