Hi everyone!
Thank you for the feedback on the haunted idea.
We've evaluated the Haunted mechanic to be too complex to introduce at this time. As mentioned by several posters in this thread, it's really Wail of the Banshee that is the source of the balance problems that we seek to address, and it's more logical to constrain changes to the spell.
We're planning on removing the death protection from non-boss creatures in Epic difficulty and changing Wail of the Banshee from being a spell that instantaneously kills up to 20 enemies for 10 sp more than Finger of Death, to a kill-over-time model similar to, but still better than, the Clr/FvS spell Implosion.
Wail of the Banshee
SP Cost: 50
Cooldown: 60 seconds (50 for Sorcerers)
You emit a terrible scream, creating a deadly area around yourself for 6 seconds. Every 2 seconds, two nearby enemies must make a fortitude save or die. On a successful fortitude save, the target takes 1 to 4 negative levels. You are free to perform other actions while Wail of the Banshee is active.
D&D Dice: Slays multiple living enemies or deals 1d4 negative levels if they save.
We're planning on continuing to monitor the effectiveness of instant death effects (and necromancy in general) and will continue to make changes as necessary. (Especially when the enhancements revamp appears. It's possible that the "Haunted" concept, instead of being a debuff, will reappear as a
positive effect for characters that invest in the Pale Master tree.)