Soul Sphere [angry]  

 

There are 3 wraiths in a single room. The room is on the first floor (height = neg 1 on my loc), at the end of the hallway to the left. There are also 2 gnomes in this particular jail cell, who will not interfere with your business with the wraiths.
Sitting by the gnomes, and facing the 3 spawned Wraiths, they appear in a circle. Each wriath will only produce a single Exiled xxxx. At about 4 O'clock, the trooper Wraith, at 8 o'clock, the officer, and at 12 o'clock, the Soldier. Killing the wraith will sometimes create a fallen new mob. Exiled XXXXX of Marr. After the kill, turn in the Box of souls to the Exiled, and get the sphere and a bit of exp.
An Exiled XXXX seems to appear about 1/2 the time on each of the 3 kills. The repop rate is 20 minutes. So set aside about an hour to get all 3 spheres.