Playing on my other villain, Planterror, at level 13 I have just been introduced to the contact "Dr. Shelly Percey" and the first mission "Find the Nictus" is about stealing a Nictus from the Council.
Just putting it out there that perhaps a Nictus mission could be the other side of the same mission, where you have to try and protect the Nictus from being napped. Also, related, trying to establish and maintain a relationship with Arachnos (and other groups) while dealing with Dr. Aeon's attempts at stealing/dissecting Nicti (Nictuses?).
Other than this, I don't think I've seen any mention of Nictus so far. 😕