I found that restraining horses to greek (at least in the first moments) makes things a bit easier for balancing. Those greek horsemen are really a pain, specially in the first moments. This can be a problem to get some myths later, so eventually I'll place greek ranches when both economies and militaries are more or less balanced. I doubt this will be usefull in harder difficulties.
I'm still testing the starting setup, but buillding (as it is free) a seer, a diamond, and a defense Tower on each faction seems to be a good strategy for early access to myths/tokens, while having some defense. Adding a pottery, a jewelry and a moonstone (total 6 actions, still 3 left), and the eco is almost ready from the beggining (at least, for the more expensive bildings). A stone mason and a rock is a must in each new town...but as they are cheap to build, they might wait to the second turn....Then, I focus in starting some military and new towns. Again, only in easy difficulties.