Authority or rank in the Nine Hells, put bluntly, was the right to the origin force of Baator. As such, it was of paramount importance, and became the foundation of the devils’ hierarchy.
The eight Archdevils divided most of this authority between themselves. They had tight control over the devils under them, and could even decide which devils would rise and fall in rank. Because of this, without the approval of their direct subordinates, it was impossible for low-ranked devils to move up.
The lords of each hell had their own individual subordinates, and possessed an absolute right over their lives. This was evident from how Leylin could do as he wished in the prime material plane using Beelzebub’s memories. He’d easily taken care of the church of gluttony.
Devil society was like a bureaucracy. Status was difficult to obtain, and it was impossible to advance in rank without pushing someone...