The new pontus units aren't in the internal build yet. New unit recruitment is just about in the internal build too - but currently I'm in a pontus campaign and I'm fighting ridiculous Seleukid armies with Pantadapoi Phalangitai, Thureophoroi, and Sphendonetai/Toxotai, together with whatever mercenaries I can find. The current recruitment for Pontus (in 074) is enough to have a fun start to a game, but you'll never win in the long run unless you just recruit the hell out of mercs everywhere you go.