Another random thought unrelated to the current concern. The main thing to drive the Neverborn to omnicidal pursuits is the sheer torment inherent to their form of existence, and the desire to free themselves from it. Freeing someone from the sheer torment inherent to their form of existence is the sort of thing that Mercy in Servitude is meant for. Surrender Oaths show that the primordial titans of creation can be bound by the exalted if they can be made to swear themselves. Infernal powers offering your greatest desire can tempt people to do a lot of things.
A chain of thought that is unlikely to be relevant anytime soon, but something to consider. Especially if the Black Court make themselves an active concern for us.