Playing a game beyond the 50 province level is just micromanagement, micromanagement..... however sometimes it´s fun and have its rewards. By this time my spy-network is extensive and I have them in every province in the map. This way I can check the development of weaker factions, which I always sponsor with all money I have over 50k and aid them in other ways.

Playing RTR 6.0 (except the Romans due to the CTD at 50 provs) and when at war with, let say Pontus, and I own the rest of Asia Minor I can make them a protectorate by giving them more regions then they started out with when the war began. This way you can actually rewerse back in actual size but grow in no. of provinces. I did a brilliant game as the Greeks this way where I rewersed back to just holding 4 provinces (Athens, Corinth, Elis and Sparta) but had well over 80 provinces through protectorates and my armies was mercenaries only. Great fun! I just wish though that there was a way to prevent my relation with protectorates to get effected by them going to war with each other. It´s a pity this feat isn´t implemented in the diplo-system.