SPOILERS:
(Highlight below to read.)
I put everybody on research to get the tech points needed as soon as possible for:- 4,500 to get L1 of the faction;
- 11,000 to get L2 Science;
- 50,000 to get L2 of the faction so I can get rid of the sharks.
During this time I'll only use a farmer occasionally if the food stocks are getting particularly low, otherwise the villagers live on mushrooms. I also won't bother with training up builders until after I've got the tech points.END SPOILERS
EDIT: Perhaps I ought to stress that the above is the way I've found works best for me. Others may well prefer to play differently.