Right, declaring on Babylonia is less likely to have long-term consequences as either Greece or Persia usually ends up conquering Babylonia at some point. Greece is indeed crucial for tech trades. I guess with the Romans it depends on where they send their troops. In a previous game I had no difficulty in keeping them out of Italy, probably because they were busy taking Greece, the Levant (both of which were owned by me) and Egypt. In my last game, however, it looks like they united their entire army and sent it down Italy. Btw I think they're way overpowered, never collapsing even without having a single city in their core. And then those free armies literally teleporting all over the place. I think there should be a rule that they only get the free armies if they are in control of Rome.