One of my solo scenarios in vanilla Civ 5 was a trip through the game while building for maximum city count and density, commonly known as Infinite City Sprawl (or a few variations), or ICS. That concept was a natural to revisit in the Gods & Kings expansion. Religion seems extremely compatible with ICS, with all sorts of per-city goodies, and yet more cheap buildings that you want more copies of.
Inland Sea is my favorite map type, reliably producing lots of area to expand with lots of rivers and fertile terrain. For the civ, I didn't particularly want to use Egypt over again, but couldn't find any better choice. I do think it will play somewhat differently than the original game, though. The UB is now a faith building rather than culture, and the Piety policy tree changed dramatically. And I pumped up the difficulty to Immortal, my first go there.
Here is the starting save.