I've never played a Diety game before, so I decided to try this one for kicks
I got a pretty good start, founding my 6th city in 1425BC. I made one big mistake, though... I was going straight for Literature and had Beijing working on The Pyramids to save up shields, but France built the Pyramids in 1450BC, and I couldn't switch to Palace since it was my capital. 131 shields wasted!
I pumped up Beijing to size 12, though. I was producing 20 shields/turn, and I managed to complete The Great Library in 600BC. I'm hoping that'll help out. I don't have time to play anymore for a few days, though.