I beat Campaign:
Greeks: 20k gold for mongols on day 2.
They can only spawn between 4-10 units (swordsman and knights) so with greeks special you can afford 2 minos at the start of the game (only lasts 10 days).
I guess its possible with romans too (using knights) but have not tried.
For day 1 just concentrate on getting gold aprox 30 peasants and focus on gold faith skills (or + peasants) so when u get defeated u can save up money 15 or 20 years (15 or 20k for mongols in tribute) and afford 1 or 2 minos lairs and possibly 1 hydra (and also knights and swordsman that u can buy). Remember that lumbermills make you get less gold, so its not a good option.
If this helped you, +.
If you are looking for some .mp3 links here's one of Triple Q, search him on youtube, some of his remixes have mp3 links.
http://k007.kiwi6.com/hotlink/858xmqz6di/Triple-Q_Mashups_Like_This.mp3
 "50 years (graphical)"){kind=icon}
 "Music Catch 2"){kind=icon}
 "ELEPHANT RAVE"){kind=icon}
 "Bubble Tanks Arenas"){kind=icon}
 "Epic War 3"){kind=icon}
 "Epic Battle Fantasy"){kind=icon}
 "RoboBlast"){kind=icon}
 "Final Ninja"){kind=icon}