Update:
I worked on the mod again a bit, here are some previews of the building chains previously mentioned. Completely new ones and expanded vanilla ones
Spoiler Alert, click show to read:
Ptolemaic Native Chain
Ptolemaic Klerouchia Chain
Ptolemaic Stables Chain
New Food Storage chain (only available in major settlements)
Expanded vanilla industry chain, with armourer/blacksmith subchains, now it is possible to upgrade your units' equipment even without owning iron directly, provided you at least import it