So assuming the staff is able to drop, it has to be in a chest that is out of the way. Given the name and the looks I think its tied to one of the gods rather then an eye. Abaddon or Dhuum would be the best choice, Dhuum as far as I know has no Temple in the world but Abaddon does. The plaza of lost wisdom has a NPC out side named Explorer Rokk and he says that something important lies within these ruins. I have seen screen shots of the area and know there is an event there but so far have been unable to trigger it myself to get in to the temple. IDK just a thought anyone been able to try that area?
I did this event, and the reward is ability to buy blue and green Abaddon Talisman: http://i.imgur.com/hmfuV.jpg
Which is the important artifact they were studying.
It’s a shame we can’t transmute trinkets, i wanted to transmute my amulet just for the name