What kind of city placement do you keep? Do you overlap tiles for cities a lot or not?
Republic: I have had extensive waring while in Republic, without problems.
I usually even never research Monarchy.
Oddly enough I play monarch and emporor games now, but I have NEVER run out off things to build. Or atleast untill I get banks everywhere, (and get Smiths if I can) which is deep into the MA. I allways find myself torn between the question, More units or Improvements?
Dont be affraid to war in Republic.
Dont be affraid to put 10% lux on the slider.
When in war, take the war to them. Dont have them take it to you.
For "precise" advice on what may be wrong post a save, or a screen shot of your "core" in a game.
It will probably be one or more of below
- Not enough workers
- Not enough cities
- Not enough territory
- Not enough roads, or "land improvements"
- Wrong city improvements (eg to early courthouses and many temples + Granaries, stick to 'my order' and skip temples/caths/Colloseums)
- To many clowns/entertainers
Only build granaries (early) in food bonus/settler building towns.
Also skip Monarchy, dont even research it! Go straight thru Alpha-Writing-Code of Law-Philo-Republic
9 out of 10 you get Republic for free (if you play Conquests that is).
Else it might be smart to put Literature in there first.
Try to aim at having say 10 (or more) towns by 1000 AD! And atleast a worker per town.