I'm still figuring my way in Immortal right now. I figured out you need a Commercial/Harbor for every city, but for every other one I'm still not sure. Holy Site: These are safe to ignore if you're not gunning for Religious Victory. But if you do, how many do you need exactly? As many as possible? Industrial Zone: Since this no longer stacks, I figured it's best to only build this in cities that allows maximum coverage with little overlap. And from what I see, the only Great Engineer one would want is the one that grants 100% extra spaceproject and you should get it easily if you skip all the rest. Entertainment District: same coverage rule as IZ district. Theatre and Science district: These are the one I have most trouble figuring out. How many of these should you aim for if you're not currently gunning for their respective VC? And how many do you need when you DO aim for their respective VC? This question extends to the buildings in the district as well. Encampment: this is also perplexing in a different way. Obviously you want this built first if going domination. But for every other condition, this usually is the 3rd district to be built (after Commerce/Harbor and Industrial/Science/Theatre), which is rather late and makes me question whether it would be worth it. If I can figure how many Science and Theatre District I would need and by when, I would be able to squeeze the earlier. Although, if there's Kabul it would make this district a must spam (at least I think it was Kabul, the one that gives Encampment trade routes).