Eco-Game at -1000 right now. As I said before I'm trying a complete different strategy as Peaster (actually the first I really learned when I started with deity 7 years ago) and stopped expanding when I was around 10 cities (I really dislike spamming cities and profit from the black citizen-bug, it's not meant to be there...).
Did you finish this ? With only 10 cities, how will you build a big eco ? I needed lots of cities to support a ship chain (especially hard in Republic).
I had a few RL problems after prev post, and just rush-finished my game. I played on to 300AD, to beef up my cities and build 14 WoWs. Trade gradually rose to about 3000g per turn plus taxes. My Hides supply dried up, so I needed numerous small domestic deliveries to compensate.