@GoodGame
While I agree with the general Idea behind your post, I have some comment to make on the way it turns out.
GoodGame said:
Work river spaces and don't build tons of cities next to rivers.
Building a city next to a river means you don't have to build an aquaduct, nor pay upkeep for the aquaduct. The extra commerce from the river will be added to your city center tile. Gold-wise, it makes no difference weather you work it with the city-center or a citizen.
GoodGame said:
Build roads on the river spaces too (2 gold/tile).
I'd say: build roads on every tile in your empire. The ones that are worked by a citizen first.
GoodGame said:
E.g. Military cities only need barracks/walls/temple generally.
Of course, you should focus cities, by selecting specific cities for unit production, you only have to build barracks in those cities.
But remember, Cities need nothing, but it is your empire that
needs a city to have...
Why would a military city need walls or a temple?
Instead, your empire only needs a city to have a wall if it is a focus point of attacks, and the number of attacking units is far far greater than you can handle with your own units (this is usually only the case at the highest difficulty level) (walls don't cost upkeep by the way)
GoodGame said:
Only build markeplaces in size 6+ cities.
Only build them in cities that either:
produce more than 6 uncorrupted
gold (depends on your slider settings also, if you set your SCI slider very high, (usually the case) there will be little need for a market.
Or:
If you have 4 lux resources connected to the city trade network, or more.
With 3 lux resources, the market makes it 4 happiness and costs 1 gpt upkeep, so it cost you 100 shields more than the lux slider. Less than 3, and the market does nothing for happiness.
GoodGame said:
Only your 12+ pop cities tend to need one of every building type.
No city needs one of every building type. Cities need nothing, but it is your empire that
needs a city to have...
If my empire doesn't need a city to build military units, then it does not need barracks. If it sits at its maximum possible size, I might as well sell the granary, etc.