I like the Americans but no matter which civ you pick stay ahead in research. Culture any but choose to research religion and build cathedrals and courthouses, tec just keep picking the tree branch that continues and make sure your sicence is high in your towns(harbor& some sort of school) economic choose America and make a lot of worker towns then build markets & banks. Last dominent pick any and choose the branch that leads to rifle and factory. Starting build lots of archers then they protect your towns while supplys & units are being built, just advance through the branches of the civilopeda researching military advances.
The Aztecs are good for pretty much any victory since they start out with extra money, their units automatically heal, and they get science from temples. However, you can get any kind of victory with any civilization, so I suggest just picking who you like.