Well, that's a good question. On one hand, I'm pushing to beeline for Monarchy and pump out Settlers like nobody's business. OTOH, we'll see a great benefit from researching Map Making to ship reinforcements across the straits from our core to "INCAS HERE" on the "Known World South" map. I'm guessing it'll take another 1-2 turnsets to conquer far north enough to have a good shipping route for reinforcements. Maybe just one if you focus on setting up a port on the Incan coast, Judminder. In that case, we might do better to beeline for MM; I'd guess at least 35-40T for Monarchy (2T for CB, maybe 5-6 for Myst, then 10-12 for Poly, and 20-25 for Monarchy -- need to double-check research costs!).