Focus on military is all important IMO, although empire improvement is also essential.
Buildings I would build (and more or less the order I would build them in) are:
- Aqueduts to grow to 7 for Republic free units (each one is an extra 4gpt in savings!). This is essential in all non-river cities, even 75% corrupt ones. Obiously this should be "timed" as best as possible to complete just before growth to size 7.
- Courhouses, essential in most cities. My guidelines are corruption from 20% to 80% (up to 90% cities sometimes).
- Barracks ASAP, but not at the expense of Aqueducts.
- Markets since we are 100% cash, but not until the "right time", which is probably after we have our first war.
- NO TEMPLES, unless they are border towns in danger of flipping. Even then the AI will build a temple and lib and take back the tiles, so I am not sure I would even bother here.
- NO LIBS EVER
That is for the moment anyway. Banks, etc are good when we get there.
Also note that it is essential to "gear" your empire in a certain direction. IMO Aqueducts are the most important building in C3C as Agri (for Republic), and after that building an Iro army to take India is our #1 priority.
Building non-essential buildings is a real waste of shields that we simply can't afford. Border cities can be fortified with lots and lots of units and is probably better than Temples which will be ineffective (or non-border) soon enough.
