I'm a Epic and Huge map player who tends to play on Warlord level, that being said I tend to bee line the Liberty tree to get to the free Settler. Usually my first build is the Monument followed by a scout, after that I tend to change it depending on what civ I am playing sometimes another scout, sometimes changing between Shrine or Granary. I like the Liberty tree as it allows me to build things while going for the settler with culture. What is more optimal though? Should settlers be the 4th or 5th build? In Civ IV I would try to get a second city by 3000 BC, in Civ V that can be later like 2500 BC. I always feel like I'm struggeling to figure out what I should build next I know I need to get units out to at least defend my land from Barbs, workers to improve the tiles, etc. So what is the optimal time you feel is good to have a second city up?