[quote=@Caldizar]
<Snipped quote by Fractured>

Ah I see, that makes it easier to visualize.
[/quote]

As for your idea, I think it's a good one. There does happen to be a group known as the Outsiders who reside Outside primarily, but they're not barred from entering Existence. I think the difficulty with the other half is the idea that Existences (or Planes) are destroyed commonly enough for a group to revolve around that. I imagine that the destruction of an entire Plane is an incredibly rare event (though again, this is mostly uncharted territory so far).