My strat:
- Farms are less critical to your economy in cases of pillages.
- Under Representation each specialist gives you +3 beakers
- With Sistine Chapel, each specialist gives you + culture
- With Angkor Wat, each PRIEST gives you +1 hammer
- With Philosophical Leaders, you have +100% GPP in all cities.
- With Parthenon, you have +50% GPP in all cities.
- With Mercantilism + Statue of Liberty you get 2 specialists per city.
- With Great Library, you get 2 free scientists.
- With Caste System, you can run Unlimited Artist scientist and merchants (without infrastructure)
- If you decide to play specialists economy, try to balance your GPP in all cities with enough food. This is better than only 1 GPF (many people think that Im wrong, but the mathematic is an exact science). You MUST balance your GPP in the most of cities.
Considering this, each specialist produce:
Scientist: +6 beakers + 2 culture + 10 GPP*
Merchant: +3 gold + 3 beakers + 2 culture + 10 GPP*
Artist: + 3 beakers + 6 culture + 10 GPP*
Priest: +1 gold + 2 hammer + 3 beakers + 2 culture + 10 GPP*
Engineer: +2 hammer + 3 beakers + 2 culture + 10 GPP*
And GP joining cities:
Super Scientist: +9 beakers + 2 culture + 1 hammer
Super Merchant: +6 gold + 3 beakers + 2 culture + 1

Super Artist: +6 gold + 3 beakers + 14 culture
Super Priest: +5 gold + 3 hammer + 3 beakers + 2 culture
Super Engineer: +3 hammer + 6 beakers + 2 culture
* NOTE: Without National Epic Wonder in the city.
This work for me with Alex / Prince / Terra / Large Map (without a single cottage)