I played about 50 (edit: probably more than 50??) turns in a shadow game. I suck at this level but I played with the general plan discussed. I think it is a tough situation either way where to settle that 2nd city. Nothing in this mini report gives anything away but just in case:
Spoiler :
I settled I SE of the horses, as Cabert is suggesting, to be on the coast and get the horses ASAP. Researched AH, wheel, mining, BW. Barb city appeared in the north, close to my horse city, and now I am bogged down trying to take them out with immortals. China and everyone else is racing ahead of course. Barbs already razed my horses once. Everyone's saying these Immortals are great but I have lost 2 against CG I fortified barb archer, so I'm not sure what to think yet... not that impressed. It seems like I need more than I can produce in 2 cities just to take out this stupid city?? Maybe the idea of settling the 2nd city north of the horses would have prevented the barbs from appearing?