Is it possible to get more stings?
*EDIT.2*
I did some checking, apparently you can get more threads in Magincia.
Thread of Thought: These make the cloak of Power when you trade in a cloak of corruption and ten threads at the Seer in front of the Lyceaum near Moonglow. To get them kill(?!) the forsaken by casting exorcism on same screen as a forsaken soul. Requires 99 spirit speak. Drop rate is around 1/2. Corrupted Souls appear not to like you when you farm thread of life. They will run accross the screen to show their displeasure, skipping over other, closer targets to get to you. Best to use a stealth necromancer and bring a melee character with you to deal with the Corrupted. They tend to eat my necromancer.
Thread of Life: Can be turned in for the Cloak of Life (+3 Str, +1HPR -- sort of sucky IMHO) Use spirit speak skill near a restless soul. You just need a successful attempt at SS, so you can do it with relatively little skill. Corrupted don't seem to care for this either.
Thread of Fate: Can be turned in for the Cloak of Death (+3 each to DCI, HCI, SDI) kill corrupted souls. They appear to have no poison resist and not many hit points, but they hit pretty hard, and sometimes they will stand at a distance and cast. They appear to use magery spells and have a hard melee hit that can armor ignore for up to 40 pts. My sampire doesn't have any problem with them. Drop rate seems slower than on the other two.