How's this for comparison, Ali?
AD1-
One City, 0.15M (size 5), 2TRs (+3ea), Celebrating Monarchy (Lux 30%)
Finance: Treasury 143g, Cost 2g, Income 14g @60%
(Temple and Harbor)
Science: Advances 18 (6 white), Research 91 turns @ 10%
(NOTE: research is down in favor of RBing gold for caravan building)
Production: 1MT (1 shield, rest of workers on Ocean for trade)
Wonders: MarcoPolo (4 alliances, about 50g every 2-4 turns each)
Units: 1 Legion, 2 Horse, 1 Elephant, 1 Trireme, 1 Diplomat (only 1 Horse and 1 Trireme supported)
Romans: 7 cities, 12 techs (2 white), building GL
Egypt: 5 cities, 16 techs, building GL
English: 7 cities, 13 techs (4 white), Pyramids, building GL
Sioux: 4 cities, 12 techs (3 white), building GL
AD1000-
One City, 2.3M (size 21), 3TRs (+12ea), Celebrating Republic (Lux 20%)
Finance: Treasury 925g, Cost 14g, Income 30g (10%)
(Temple, Harbor, Market, Bank, Library, University, Aquaduct, Sewers)
Science: Advances 32 (9 white), Research 3 turns @70%
Production: 24MT
Wonders: MarcoPolo, Colossus, KingRich, Copernicus, Shakes
Units: 1xNomad, 2xLegion, 3xHorse, 1xChariot, 1xElephant, 2xTriremes, 2xDiplomats, 1xExplorer, 1xWine caravan (repeating)
(NOTE: all units but Triremes are unsupported)
Romans: 9 cities, 26 techs, GreatLibrary
Egypt: 6 cities, 30 techs, HangGardens, building Leos
English: 10 cities, 30 techs, Pyramids, building Leos
Sioux: 4 cities, 30 techs, Lighthouse
You only built 2 wonders between AD1 and AD1000, and neither was Mikes. Doing Multi City, Mikes should have been before KingRich (although it does greatly benefit for our starting location). Hanging Gardens is a decent substitute, but not enough.
Just about all of my focus between AD1 and AD1000 was wonder building, financed by alliance gifts. Whenever an AI treasury got above 50g I asked and received a 50g gift. Most of the time they were earning 20-30g per turn, so I could ask every 2nd or 3rd turn. I kept them happy with tech gifts, holding out Astronomy, Engineering and Medicine as long as I could. Many caravans were PartialRushBuys of 116-119g every second turn. Note the city improvements I put in as well - I had a Colosseum too in the early ADs, but sold it off after getting Shakes.