There's a unique temple in Ekbatana that does nothing and can be sacked for huge amounts of money (17000 IIRC). That's an incredible boost to an AS campaign. If you still need cash by the time you take Sidon, the Cedars of Lebanon work similarly. A few cities (Antioch, Seleukia, and Ekbatana, I think) have large granaries, which are now destroyable - that's a few thousand more mnai for you.

I found my AS campaign disappointing. AS starts weak, but so do the Ptolemies (and everyone else) so it's easy enough to beat them once you've scraped half a dozen units together. Mines in Karmana and Gabai quickly make the economy self-sustaining. I played this campaign on VH since AS is one of the few factions where RTW's "attack the player at all costs!" style of diplomacy makes some sense, yet Pontus, Hayasdan, Parthia, and Bactria have remained completely quiet into the 240s... I've heard the AI has too much respect for stone walls, so fortifying everything as soon as I could afford it, especially in the east, may have something to do with that, I guess.