[1] According to Hamdallah Mustawfi, Fakhr al-Din Mustawfi enjoyed a flourishing career under the Ilkhanate—first as the ṣāḥib(-i) diwān (finance minister, vizier) of Gaykhatu during his governorship of Anatolia, and then later as bureaucrat under the Ilkhan Arghun Khan (r. 1284–1291).
[1] He played a role in the downfall of the Ilkhanate ṣāḥib diwān Shams al-Din Juvayni, being part of the circle of advisors around Arghun, who urged him to make Shams al-Din stand trial, on the accusation of poisoning Arghun's father Abaqa Khan (r. 1265–1282).
[4] Fakhr al-Din strengthened Shams al-Din's policy of increasing the Iranian influence in Anatolia, appointing "innumerable Tabrizis, Hamadanis, Iraqis, Khushkanis, Khurasanis, Georgians, Alans, Marandis, Nakhjawanis, Tiflisis and Arranis."
This led to a closer connection between Anatolia and the Iranian intellectual and literary world.
The instigator behind this was the new ṣāḥib diwān Sa'ad al-Dawla, who achieved this through the spread of defamation.