Well, if we're going to add Pergamum, we should start planning. Here's my proposed army ideas for them, with a mixture of real and "what if" units:
light peltasts
archers
thureophoroi
Galatian AoR from next door (they used a lot of Gauls--we could even script in a recruitment building that will appear only if a Pergamene general defeats a Gallic army)
hippakontistai
xystophoroi
AoR specials
They would get AoR hoplites from Ionia and, although I'm not sure how to work this, phalangites from any successor area. Once Pergamum controlled ex-Seleucid regions, they begin recruiting phalangites from those.
Add to this a substantial merc pool, up there with Carthage's for size.
Any other ideas? This list seems kind of skimpy.