-Must have a naval unit at important trade routes.
-Succession in Republican governments is determined by influence and succession in monarchies is determined by lineage.
-must use semi-historical armies.
-can use the move_character cheat to better represent naval and terrestrial travel considering the pitifully slow rates in RTW, but nothing over the top
-expansion is limited to areas were the faction had historical interest
-After a conquest and the establishment of a temporary military government, build a level 1 barracks to garrison the city. After a government is established build up the infrastructure before building up the military buildings and happiness buildings.
-Set up logical governments. For example, if your playing KH, Spartan Agoges only in places that used that type of government like Laconia, Crete, and Thessaly. And for Carthage, build a New Colony government and then after a generation or so upgrade to a colony if possible.