I haven't worked my way down to Arabia yet, but if you want to share go ahead. I don't have good references to use, only Wikipedia and Google Maps.
After repainting Hellenopolis and Edessa provinces with Numahr's approval, here is my revised rework of d_edessa:
Edessa (Justinopolis) (c_edessa): Edessa (Justinopolis), Serug (Batnae), Harran (Carrhae, Hellenopolis), Tell Abyad. Reduce holdings from 5 to 4.
Carchemish (Europa) (c_tell_bashir, formerly Hellenopolis): Carchemish (Europa), Manbij (Bambice), Nizib (Nisibis), Birecik (Birtha)
Aintab (Antiocheia ad Taurum) (c_aintab): Aintab (Antiocheia ad Taurum), Marash (Germanicia Caesarea), Cyrrhus, Tell Bashir. Increase holdings from 3 to 4.
Aleppo (Beroea) (c_aleppo): Aleppo (Beroea), A'zaz, Harem, Ebla, Sarmin, Maarat al-Nu'man.
After repainting Hellenopolis and Edessa provinces with Numahr's approval, here is my revised rework of d_edessa:
Edessa (Justinopolis) (c_edessa): Edessa (Justinopolis), Serug (Batnae), Harran (Carrhae, Hellenopolis), Tell Abyad. Reduce holdings from 5 to 4.
Carchemish (Europa) (c_tell_bashir, formerly Hellenopolis): Carchemish (Europa), Manbij (Bambice), Nizib (Nisibis), Birecik (Birtha)
Aintab (Antiocheia ad Taurum) (c_aintab): Aintab (Antiocheia ad Taurum), Marash (Germanicia Caesarea), Cyrrhus, Tell Bashir. Increase holdings from 3 to 4.
Aleppo (Beroea) (c_aleppo): Aleppo (Beroea), A'zaz, Harem, Ebla, Sarmin, Maarat al-Nu'man.