This looks like a fascinating and innovative scenario; however, it is quite difficult at the same time.
Are there any strategy hints out there that might help me conquer the New World? Seems like 1) your economy is just piss-poor from the start. 2) You have few cities at the start of the game. 3) There are just so many Aztec units, etc.
Seems like building "immigrations" and conquering the Aztecs to get the economy rolling are big keys here, but it is hard to build momentum starting off from such a weak base.