The Seleucids deployed the phalanx in the centre with cavalry on its left, infantry on its right & their elephants on the far right flank.
The Pergumens had the phalanx on a ridge in the centre with infantry on each flank of it, some light cavalry & infantry on their right & their cataphracts & more light cavalry on their left.
The Seleucids made a general advance, only holding back some infantry on the right of the phalanx. The Pergumenes advanced on the flanks & waited on the ridge in their centre with their heavy infantry.
The Pergumenes won both flanks, but the Seleucids won the centre. The Argaraspids beat the much larger immitation Romans by a flank attack & the superior Seleucid phalanx eventually overcame their opposite number. A few other loses here & there was enough to push the Pergumenes below half strength.
It was enjoyable battle with a good deal of manoeuvre. It certainly wasn't a case of "form up two lines & throw dice at each other". We tried yet another variation in the close combat system - it seemed to work real well & it may finally be what I have been looking for.