In the one i'm playing right now (still 237BC, screenshot is in AI progression thread):



Makedonia has taken all of Greece, including Epeirus starting lands, and is pouring into Asia Minor, so i should think they are very rich and powerful.

Ptolemoi have ALL Seleukid land west of Babylonia and all of southern Asia Minor, so second to me they seem to have the richest, biggest and most powerful empire.

The Romans, funnily enough, have taken all of Italy except for Tarentum, haven't tough Sicily, have all of Cisalpine Gaul and most of Gaul itself. They've reduced Averni to 1 province and no armies and have made them a protectorate, and have reduced Aedui to 1 province and protectorate, but they have many armies stood around doing nothing.

Those are the 3 main ones that are doing well so far. I'm the richest and have all of Britain and 2 provinces in north-west Gaul on the coast, but i'm playing houserules with only 1 army so i don't just steamroll the entire map, which i don't want to do.