Wow! We're making about 160gpt off the Celts! It's really a lot more than I expected out of the AI on a Monarch game. Would they make more money growing into defeated American lands, or are they better peaceful?
-Just an observation: We're at 35% of world area. Celts are #2 with 20%. So we can take every inch of Spain without having to worry about going over the limit.
-On workers: I'm not sure we want to be building workers in core cities like Trondheim. I guess the vision I'm trying to push on everyone is size=12 core cities first. So, Trondheim, Channel City, Aarhus, Bergen, Oslo, Reykjavik, Molde, all size 12 ASAP via worker stuffing. We maximize our non-specialist science that way. Sacrifice shields for food if necessary. If there's nothing else to build, maybe units just to disband elsewhere for infrastructure. Or courthouses for when Ghandi come marching in.
-I don't think we need too many defenders. With the rail network under way, we could have maybe 10 attackers anywhere on the continent ready to repel an invasion. But for later... how many defenders will we need when the 'variant' aspect of this scenario really kicks in?
-I like it that we could build the Ironworks in Stockholm, but it's killing me that we're not taking advantage of the worker-spam possiblities there.
1 turn worker factory in Stockholm:
-Build granary
-Rail 3 floodplains, coal
-Grow to size 5.
With the granary, the city will only need 10 food to grow. At size 5, well, 3 floodplains = 15 food, 1 plains = 2 food, city center = 2 food. Then the coal hill adds the 20th food. 10 get consumed by 5 citizens, 10 leftover, so 1 turn growth!
Railed, the coal hill will give 6 (or 7?) shields. City center is 1, the plains is 1. That's 8. But we grow, so the added citizen should go to the iron, putting us at about 12-13. There's some corruption, but we appear able to get 10 good shields.
Ta-Da! 10fpt + 10spt = 1 turn workers

In our circumstances, it seems like 1 turn workers are the best possible product a city can produce.
-We have a lot of gold! We could spam about 6 workers in the North right away if we want.
Spain: It looks like the only real catch is that Madrid and Toledo are inland. Everything else is coastal and easy pickings for our berserks. Nice set-up. I don't think the AI will attack a full-strength army, so it could be used as 'cover' for going after the inland sites.
In text my tone sounds a lot harsher to me than I intend. We're quickly advancing, I just want to maximize everything...