I agree with Blastoid on proposed tech route.
Alphabet would take a full 30 turns, that is about two complete turn-sessions, or one if we manage to give good complete orders for the session. I think doing 30 turns in one bout would make sense, so we can have a longer round discussing which trades to make etc. after Alphabet is researched.
To be honest, all that needs to be done, is to scout the last patches of unmapped land, and to train our horsearchers on barbarian units and animals around. If we research alphabet, that means production lines in the three cities we got for 30 turns each, as well as worker orders. Quite possibly we need a last settler for a fourth city made in Arete, and fill in the gap around cow and silks, interlinking Arete, New Giruvegan and Warlord City.
Production would then look like this:
Arete: Horseman Archer (2), Horseman Archer (6), Archer (2), Settler (6) Library or Workers
New Giruvegan: Worker, Monument, Worker, Granary
Warlord city: Monument, Barracks, Archer, Stables Horseman Archer
New City: Monument