Yup, I definitely figured out the hard way it must be the 10 star enemy generals. I just beat even more selucid levy and medium pike phalanxes with pontus using native hellenic spearmen, axemen, etc. Don't get me wrong - the pike phalanxes are very excellent infantry, as they should be. They just don't appear to be unkillable supermen now, when facing superior numbers and tactics.

Seriously, I would surround a levy phalanx ON ALL SIDES with spartan hoplite generals, and charge the back of the enemy over and over again for half and hour and they'd still be there killing my units. It was extremely tedious. The whole time I was saying to myself "Holy crap! Those pikes are THAT tough?" Either that, or I figured Spartan hoplites sucked, but I couldn't imagine why that would be the case. I kept trying to think what I was supposed to be doing different than surrounding them on all sides and hitting them in the flanks over and over again.

As to the 10 star enemy macadonian generals... they are unkillable, unfortunately (LOL). They can charge into spartan hoplites and stay there for 30 minutes hacking away. Then run away with one dude remaining.