You start with plenty of ressources with all tecnologies researched in Post-Iron Age.It´s a battlefield game.
The choice of a civilization is not important because you have to put "all tecnologies".
Conditions to scenario work well:
-Use population limit to 200 in single player (to allow computer making 200 too)
-before starting the game put option "all technologies" but don´t reveal the map.
-Put in hardest difficulty
-Don´t rush or attack your opponent until 15 minutes if you want a good game.