One of my major complaints with the game, even though I enjoy the game. It's just too slow to expand borders. Is it worth it to build a cultural district just to improve border expansion? Does a cultural district increase expansion in all cities or only the city you build the district? I find myself often choosing the 15% faster border expansion pantheon but it seems to make no difference. I figured this pantheon would be worth it it could save me buying at least a few tiles (should save me 1000 gold in theory which seems good), but it's still so slow. Any tips? I know optimally I should switch out policies for the 20% discount, buy a whole bunch of tiles and then switch back. But I'm bad at saving that much money. I find myself spending most of my gold on buying tiles and don't have much left over for rush buying buildings or units. I find myself approaching the 1800's and still can't expand to the 3rd ring naturally.