Yeah, cannons + grenadiers + frigates are a typical MP tech path for exactly the reason you mentioned. Especially, if the map is watery. You wouldn't typically have Education though if you are on this path but would have Guilds because knights are one of the premier MP units.
The issue here is that cannons + grenadiers can be countered by rifles and especially cavs. But I think you are right. I will go Engineering -> Chemistry -> Steel and plant two cities on the barb continent to get internal 2 yield trade routes. A lot of my cities have only 1 yield trade routes because most AIs are in Mercantilism.
The issue here is that cannons + grenadiers can be countered by rifles and especially cavs. But I think you are right. I will go Engineering -> Chemistry -> Steel and plant two cities on the barb continent to get internal 2 yield trade routes. A lot of my cities have only 1 yield trade routes because most AIs are in Mercantilism.