Definately Ptolemaioi, though I never played Romani. The Ptolemaioi start out being able to train Pezhetairoi, and are only 10 turns away from Kleruchoi Agemata. I think by about 30 or so turns into the game, I had 6 full stacks, 6 units of ships, 5 or so million mnai, and all of Asia Minor, Arabia, and Egypt down to Axum conquered, and had pushed the Seleucids out of Seleukia to the other side of the mountains. Easy stuff!