Here is my current game I am playing today, Carthage, Archipelago map, standard size, low sea levels, 7 civs, Monarch difficulty with locked modified assets and no reloads done at all so far (Playing with HOF rules, I'm still not good enough for Immortal because I make too many mistakes though I spent the last few weeks playing on Immortal learning how to do this) - 60 BC and 14 cities placed, plus my economy is good enough with the GLH to maintain a 40% science rate and I still dont have CoL. I could have had 16 cities easilly if I had trained an extra couple of settlers in my first two cities, but generally, 12 cities by 1 AD is the target to aim for, 16 by 500 AD, and 20+ by 1000 AD:
This is the map overview showing my cities and resources:
This is my capital with GLH, Glib, and nearly finished with the Collosus (I have copper, marble and stone on this map

):
And this is my second city which is the first fully developed Rex city with a Granary, Lighthouse, Monument (for CHA leader only, otherwise dont bother with monuments), Forge, Library and Cothon:
They are very easy to set up, and bring in lots of

. Then the next buildings you add are Courthouse, University, Observatory and Customs House and that is it - only build

buildings in your Great Merchant farming capital, and in other cities if you need a boost, but Couthouse / Harbor / Customs house should be all that is required to make every city profitable. My capital spawned a Great Engineer first though, which is a first time for me, I were like OMG where is my Merchant? I want an extra 10% science

. But I'll get a free wonder now, either the Mausoleum or Taj Mahal (I already have the Parthenon 33% built, and changed production to a cothon in Hippo, so I'm not wasting it on that).
I also just got the Warships quest which will give my cothons +2

each so yay

.
I think I want to conquer the nearby Germans to steal that 5 sugar site. I have my mapfinder set to start me near 4 sugars minimum because they often come in huge clusters for a mega city like on this map, but the AI got them this time

.
My tech path was Agricuture > Animal Husbandry > Wheel > Pottery > Sailing > Masonry > Bronze Working > Writing > Iron Working > Metal Casting > Compass > Aesthetics > Literature > Alphabet > Music (settled GA for +3 GPT) *Trade Alphabet to backfill Ancient techs and Mathematics > Currency > CoL and Beurocracy next.
Very easy on Monarch difficulty, plus I have the GLH, Glib and Collosus capital easilly set up, which will then get Oxford and Wall Street.
40 BC, and Collosus plus two more Cothons are up:
The collosus gave me +14 GPT, wealth in my capital gives +11 GPT, and the two cothons built the turn before and after gave me +6 and +10 GPT each, allowing me to increase my science rate up to 50%.
But I'm not building wealth in my two main cities, they are producing more settlers for the southern island, so my GPT is temporarilly in the red.