If this stat thing is a problem then we should skip it and rather keep mostly to that of adding some 3-4 mercs to the underrated factions

If there is going to be some changes to the unit roster with the Barbarian factions then we should mostly keep to the formula in making them formidable against the Hellenic and Eastern factions, where the ranged units are probably the most important while we should avoid changing the melee and cav units. But some underrated factions could be like a hybrid of two others and have some limited mercs. For an example then Koinion Hellenon and Macedon are the pure Hellenic factions, but Epirus could have more Gallic units as a hybrid while Egypt could have skirmishing units from the east or west.