Good to see you are doing better!

Finish off Hekatompylos and Gabai, then Pahlava won't have a foothold in your lands anymore. That way you can hold the Hyrkanian defense wall (Zadrakata and Asaak).

By the way, 20 units is the maximum of a stack. You might be confused because there are two rows and 2 units. Those 2 rows are actually 9 per, not 10.

~Fluvius