There were not many levels in the Corpsedemon hierarchy. There are the Genesis, the Line, the Faceless, and the Omnia, four in total.
But there was an extreme gulf between these four levels.
The Corpsedemons was a race that focused heavily on their bloodline, a person would be forever bound to the level they are born into.
Even if a person were to train like mad at the latter stage, it could only see small increments.
The relative difference in strength between the various levels was as such, that any power-ups would be almost pointless, and could only be used within their own level.
The only Omnia-level Corpsedemon in the Daywalker Council, was the Speaker, Tawalah alone.
And for the Nightprowler League, only their leader, Lighteater.
Essentially, between the Daywalkers and the Nightprowlers, one was in charge of day, another night.