I found that diplomacy is tailored for each faction. When you are playing alliances should come easier with particular nations and total war for others.Are some nations hated more than others?
before, Arkhe Oligarkou had Hoplitai while Arkhe Tyrranou had only Hoplitai Haploi. Now that the Bosphoran governments have have changed, Arkhe Tyrranou is better than Arkhe Oligarkou from a game play point of view. Oligarkou has 5% less public order with the same recruitment for 8000 Mnai and higher prerequisites.