There was a bug for awhile, where the Demons and Angels did not call for help. This is why a single person could clear out all the Angels, and is also why a single person could clear out all the Demons. And yes, I remember Narsrim killing 29 Demons on Nil, not to mention Rhysus clearing it out during this time period, and conversely Magnagorans doing the same to New Celest.

And Magnagorans still doing it to Faethorn 'cause they're not loyal.

That needs fixing