Ideas Needed - Vrocks and the Plane of Despair

I know that I've been throwing out a lot of home-brew ideas that may not be useful for everyone; but since I get a lot of creative feedback, I press on with one of my last reamining topics.

In my campaign, I created a new plane which is a plane of emotional despair. Not the apathy of the Grey Wastes so much as a plane of complete and absolute feelings of unworthiness.
I designed it along the lines of the Egyptian hell (the trials a dead soul went through before reaching the Halls of Judgement and the Realm of Osiris)

I won't go into the whole setup unless someone is really curious. But there are only two ways into and out of the plane. The first involves the visitor going through the formal entrance to this plane and passing through all twelve stages. (Which is only possible with the assistance of the nightly arrival of Ra's barge - the only point of hope that reaches the plane). If one enters the plane this way, the ONLY way out is to plow ahead and go through all the increasingly horrible and depressing stages to reach the Egyptian Hall of Judgment.
The second method is through a dimensional rift from Mt. Celestia. Periodically, a person climbing the slopes of Mt. Celestia will cross into a dimensional rift into the plane of despair (often without realizing it). At this point, the fiends of this plane are allowed to test the visitor in the hopes that the visitor will fail and be trapped in this plane of despair forever. If the visitor passes the test, he can travel back to Mt. Celestia to continue his climb. These rifts to Mt. Celestia can ONLY be used to escape the plane of despair IF the visitor arrived on this plane from Mt. Celestia.

For the primary occupant of this plane, I tweaked the vrock to serve as the "angels" of despair. I thought that the fact that they seem to be a twisted revesal of the solars, etc. of Mt. Celestia fit well with this theme. I also like thinking of them as "scavengers of emotions" (fitting with the vulture characteristics, not any previous vrock behavior) and that they (vultures) were once considered as praiseworthy agents of the divine in ancient Egypt.

I am also taking inspiration from a Brazilian legend:
Originally, the skies were in perpetual darkness with no sources of light (no sun, moon or stars); and the creatures of the world suffered accordingly
In a forgotten age, before the Beginning, the Greater Spirit had shared a bit of His wisdom with the most powerful of the animal gods, who, in turn, had given gifts and guardianship of powers and knowledge to each one of the animal races.
Heresa Heri (the Giant Vulture King) had received the domains of the skies, disease and death. At that time, the Vulture King was the most beautiful of all birds, as his feathers were white and he had a shining, silver and golden plumage cascading over his head and shoulders.
It turns out that the Vulture's shining headdress was made of enchanted pieces of crystal, diamonds and other gems, turning them into a permanent type of light unknown at that time. But instead of sharing that light with all, he had decided to enchant the gems only for himself, and fused them with his own body, creating that shining feathered headdress.
He was eventually confronted and deated by a mythic hero. Trapped by magic, the Vulture King exposed his coward nature, saying he would gladly barter anything for his freedom.
The silver and gold feathers from the Vulture King’s headdress were scatter them throughout the skies (i.e. creating the stars, moon and sun). This left the Vulture King bald
All vultures flew to rescue their leader; but upon spotting the human shaman, they thought better of it and decided to wait for the best moment.

So for my campaign, this legend will be a retelling of the following facts:
-Vrocks were once divine creatures and great warriors of the skies that never knew defeat. They protected the skies and also guided noble souls in death (psychopomps) They may have been created by or served the Egyptian goddess, Nekhbet, whose symbol was the vulture. At this point, they were residents of the Upper Planes and possibly Mt. Celestia
-The vrocks became too proud and vain of their status. They refused to risk sacrificing what they had attained (i.e. symbolized by the Vulture God’s hording of divine light).
-The vrocks were challenged by an agent sent by the gods who was sent to test if the vrocks had truly become that self-absorbed
-The vrocks failed; and in their fear of experiencing failure and the threat of death for the first time, the vrocks began bargaining, offering to sacrifice ANYTHING in exchange for their lives. In the eyes of the gods, this was their greatest sin and one that was unforgiveable.
-The vrock were transformed to their more hideous physical aspect and banished from Mt. Celestia and the Upper Planes. They had to relinquish their protectorship (represented in the story with the dispersal of the points of light in the sky)
-Now the vrocks live on the Plane of Despair, forced to live with the shame that they had failed in their goals of greatness
They now seek to show that deep down, no one is worthy of greatness. When someone fails because of the vrocks, the vrocks are happy and feed of the person’s despair. When the tested person succeeeds, the vrocks become more despondant as it indicates that there are beings (even "lesser beings") more noble than they are.
In these ways, the vrocks are a type of anti-angels. They did not turn away from the gods like the devils did; but they failed to live up to the standards set by the gods and by themselves.
The devils are convinced of their superiority and their right to rule. Vrocks are convince of EVERYONE’s inferiority and unworthiness. The seek to make everyone feel as worthless as they know themselves to be.

I know that most people wont want to tweak thing this way, but even if you don't use these concepts; can anyone think of anything that they could add? Any interesting twists or considerations for a Plane of Despair?
I'm thinking of adding "higher" levels of vrocks with special powers, like a sonic attack. I'm open to suggestions