Well, what I really like to do is playing a OCC on a Large map with one or two opponents - mostly Montezuma and Shaka (or other Warmonger). Then I make a City that has a VERY good terrain around itself: Mostly Lush, but for Cultures I usually add 1 Dunes, 1 Desert etc. Also, Forests, Bamboo, Savanna etc, and as much resources as possible in the vicinity of the city. The rest of the resources I spread outside the city's vicinity. Now, try to beat your opponents! (Extra hard rule: you are allowed to attack them and kill their units, but you never ever are allowed to conquer their cities, pillage their improvements (except for Horses, Iron, Uranium and the like) or use your army to purposely "block" their tiles so they can't use them.