[Uthgaard]

As far as live was concerned, higher charisma did help necros land screaming terror and charm, just to a much lower extent than it helps an enchanter fill the same role. Quote from a live dev:

"Is Charisma actually taken into account on mesmerizations and charms?

Yes it is. It varies on a number of spells to its actual usefulness but it does have a use. There are different levels of charisma for different classes. The system does take into account that an Enchanter should have a higher charisma than say a Necromancer. It�s unfair to expect masters of the undead to be entirely charismatic."

http://eq.crgaming.com/viewarticle.asp?Article=4451