| >>if mere contact with the Necromancer is enough to mess up an Empath, then similarly the contact itself should be equally detrimental to the Necromancer.|
Necromancers don't really have a thanatalogical sense to harm, in the same way that empaths have an empathic sense (though Armifer may correct me on this). They don't accomplish what they do by honing their senses, but by perfecting rituals in a highly mechanical way.
I guess you could compare it to two people who learned to navigate a maze, one by noticing visual clues (say, an arrow pointing in the correct direction) at every turning, and a blind man who uses trial and error as well as memorization in order to find his way to the center through a brute force approach.
If you blindfold them both, the one who is used to navigating by visual clues will be greatly hindered, while the one who navigates by rote memorization and brute force will still be able to navigate to the center.
However, given a different maze and no blindfolds, the person who uses visual clues will still be able to easily find his way to the center, while the brute force memorizer will have to begin the laborious process from scratch.
So empaths, since they are relying on their empathic sense and not ritual and memorization, will be more adversely affected by a diminishing of the empathic sense through a clash with necromantic corruption. Not to say there isn't a way for Empathy to do Bad Things to Necromancers, just that the Modien are not sharing their goodies with the class and are not likely to start doing so anytime soon. <g>