I believe it would go, Ghana, Mali, then Songhai.
According to the document you've provided, what the Mongols sometimes did was keep a governmental system in place if it was proven to be effective and also useful for their Khan. And this is reasonable, they had no reason why they wouldn't leave a governmental system in place which was very effective and was producing a lot of goods for the Mongols.
Following the Anschluss of Austria to Nazi Germany, in March 1938, the conquest of Czechoslovakia became Hitler's next ambition. The incorporation of the Sudetenland into Germany that began on 1 October 1938 left the rest of Czechoslovakia weak, and it became powerless to resist subsequent occupation.