cottages are nice but let me offer some experiments for you...
3 - try your cottage industry via education , try a specialist economy via mysticism , and try to build a trade economy (think trade routes , maybe great lighthouse).
Done and Done. I played 110 turns with Dain the caswallan, as he gave the greatest boost to the specialist economy (Starts with ancient chants, and is philosophical). I actually did this before you even suggested it.
The Education build, since it gets agriculture, managed about 280 points, and had three cities that were already decent size, and more infrastructure due to having gotten workers earlier, and more often.
The Specialist econ had 250 points, having the same cities, but not as large (No farms) but had two academies in the two most major cities. It had managed more research by about 300 beakers (Not unimpressive).
So, I figure this is a pretty darn good excersize, and am glad someone happened to ask about it, because I had the answer handy

. Some big notes here:
1) The pair of academies offered by the great sages were likely going to keep the science output of the specialist civ higher than the education one for a while, though after a little longer the education one will also get an academy or two, matching the output.
2) the growth rate of the education based one was noticeably faster, partially due to maxing it's cottages earlier, and having more of them, but mainly due to having farms ASAP. Farming 5 squares allowed workers and settlers to be built quickly while on the route to education.
3) Take a grain of salt here, in that Dain is very much predisposed to this route. I could have, for instance, used my first great scientist to bulb KoE, something the amurites would generally like. He is the exact right mix of civ, traits, and starting tech, to make this strategy worthwhile. Further testing on other leaders would be required to make a more difinitive statement, and there is no arguing that start is a factor. If you have no where to put cottages, that's just not going to be a good way to go.