rule of thumb(science domination diplo): always run universitys, have at least 5 pop to do so, (3food to keep growing)
culture victory: obviously all culture buildings, you dont "need" scientist allthough it helps ( you can relocate if building a critical culture wonder/units/buildings as needed) korea is very powerful here(UA)
always lock all your tiles and go to production focus ( hammer trick), when city is attacked and potential tiles blocked, switch to foodfocus)