I found an Unlisted AioC inside the FV tunnel heading toward the Dreadlands it is for The Dreadlands itself. Killed Gorenaire in there using him.
Location is:
219.60. 5825.49, -63.57
For your Firiona map
P -5825.49, -219.60, -63.57, 240, 0, 0, 3, Agent_of_Change_(Dreadlands)