1. Have 2 players who want to be allied in advanced choose persia and india.
2. have both players locate each other in the game and go to war with each other.
3. This is where the fun begins, have the persian player biuld a capitol near the indain one. Let the indian player take the capitol for the border bonus and push. Then have the indian player biuld up the citywith all the economical biuldings.
4. have the persian player take it back. Have the persian kill all caravans and set thier spawn point near the indian army for unlimited free gold!
5. have the persian player keep making capitols by destroying the senate they get after each time they take a capitol back. let the indian player take all capitols except one.Since everytime you lose a city you get to biuld another one, you can have over 20 citys in your national borders.
6. Give the indian player wood so he can biuld up your captured citys. having 20+ citys can give you huge economic advantages. If the indian player does his job, you can have 20 universitys creating tons of knowledge without biulding a scholor, 200 gold income from markets with huge caravan bonuses due to all the biudlings (times 15% for indian), and a bonus of 200 wood and food, let alone so many oil refinerys you only need 1 drill.
7. now its the indians turn to suffer. have the persian retake ALL of his citys, but conitnue giving the indian unlimited gold (caravan spawns). let the persian capture the indian citys and repeat the process (although indian will biuld most of thier citys up due to persians alerady serving thier deal (shoudn't cost that much though, just buy the wood with all the free gold, makes enemys pay huge somes of money for more wood.)
8. have the indian retake all his citys. both nations should now have a TON of citys. You can get so much they eventually say INDIAN23 as a city name. While having a weak and slow start, both nations should be very economicaly stable, only have to worry about metal due to all the city benefits.
9. After the massive economy, comes the unit exchange. Have the indian make about 20-30 elephants and persian 20-30 immortal upgraded units. have spys bribe each other nations units. Why have persians bribe elephants? Indian elephants are cheap and can upgraded by persians. So instead of getting expesive ass elephants, they get the same unit at a fraction of the cost. And the indian get the very usefull ranged heavy infantry.
10. Now agree which nations get which wonders (optional). Have the indian player biuld the wonders in each specified city. Just capture a persian city, biuld the wonder and leave.
11. PEACE! alliance should now be made. Players SHOULD easily win.
Well thats my little strategy! I hope it wasn't too long or boring, and i ahve yet to test it, unfortunetly, but it is possible to due. Although you may be open for attack be other players, both players fight the enemy together like the unofficail allys they are. This strategy may be used in many other ways to exchange unique units and get tons of citys (romans uberboom wealth with 20+ citys, Huge boost for lokata food, plus ally get resources gathering horseman), but this way seemed like the best to me right now since neither persia or india is getting exploited... i mean "used" as much as they could. Please post comments and suggestions! this is just a brainstorm so dont flat out take personal attacks, i want "constructive" criticism.