You can find the France demi-god save here
http://forums.civfanatics.com/showthread.php?t=263213&page=11
the Byzantine demi-god save here
http://forums.civfanatics.com/showthread.php?t=274997
the Korea Deity archipelago save here
http://forums.civfanatics.com/showthread.php?t=277419
and Chamnix's calculations and ideas about worker pumps and adding them in, as well as some discussion on such here
http://forums.civfanatics.com/showthread.php?t=277648
So, in conclusion concerning city spacing and "higher" levels... play on archipelago maps (NO barbarians.. you probably won't like them on Demi-God and almost surely not on Deity or sedentary barbarians), pick warm, wet, 5 billion maps (SirPleb has said they tend to come as food rich, and he seems right... less desert at least), pick 60% water maps since that favors the build, probably large or huge maps at the start (get used to a longer turn-time between turns as the game goes on... do the dishes in between or something), maybe standard maps once you get the feel of it. Warm, wet, 5 billion will also help you get away from the agricultural trait, as you'll have more food to start with. I don't know about continent maps, but for 15 tribes Deity on a Huge map, you can and probably will feel "boxed in" and you'll begin to understand why they call it a "forbidden" palace, as getting the ability to build it seems "forbidden" at that level almost if you don't take territory from the AI/war scavange or have a really good start.
Use of Chamnix's strategy of mass-adding in workers to get faster growing towns after the ReX phase to take your towns to size twelve ASAP.... this helps to offset the advantages of the agricultural trait... and then use it again in the age of hospitals so that you have metros with fully worked tiles AND specialists in your metros. That should offset *some* of the problems the original post expressed concerns about.
Also, concerning wide spacing, you can always play with fewer tribes on demi-god or deity. You probably won't get boxed in as easily. You can also set up the game so that it feels like an easier game... see T-Hawk's first Deity game here:
http://www.dos486.com/civ3/solodeity/
As a disclaimer to cxxc spacers, I haven't argued *here* that wide spacing works better than tight spacing... I've just shown it as viable on higher levels. And I doubt that comments like these "CxxC is the absolute greatest basic strategy that you can use." really help the player who posted this... even if it holds true.