I spent the past days on farming Wraiths to get a Wraith Companion. I think it took me a total of 30-32 hours gaming time to finish this task. As far as I know its the first one on Sarlona, so i post some facts bout it here
First of all, I used the ddo wiki to find the 30 different kinds of Wraiths:
its a very helpful site because it shows the Races of the different mobs in the quests. The Watcher of Dreams in The Eye of the Titan is somewhat a wraith but does not count in the Monster Manual (maybe he fakes his race, i dunno)
Then i did about 1150 runs of Deleras part 3 to farm the first 6 spawning wraiths.
Last but not least i wanna present Samara to you (I named her after the little girl in The Ring)