Maybe, to take your point VT Martin, about smaller, more challenging armies, I could do something like this:

3 x Keltohellenikoi
2 x Thureophoroi
1 x Karian warband
1 x Galatian Tindanotae

1 x Sphendenotai/Iaosatae
1 x Kretan archer
1 x Peltastai

2 x FM
1 x Asiatic Hippakontistai
1 x Thracian Hippeis/Curepos

That's a 14-unit stack, rather than a 19-unit one, and less cavalry.
I'm really looking forward to see how this "reduced" stack will do against a heavy 20-unit Seleucid Army. I guess there will be an AAR in your other thread. Good luck.