Necro Discussion

[quellren]

My brother played a necro on live, release to LoY and I'm giving it a run here.
Some conversation with him brought up some questions, mainly about gearing and playstyle, so I thought I'd ask the group:

Somewhere the belief that the lower the charisma, the better fear works.
Real or Myth?
Corollary to that:
If low charisma=better fear, then how does a necro charm undead?
Is that the same mechanic, or do necros have a charisma set?
If they DO have a charisma set, how?!?!?!
How do you stack enough cha to get up anywhere near the 200 where chanters say is the magic number? my starting 60 cha is pretty low. Do you need 200?

So for you TL;DR folks,

How does a necro reconcile the understood need for lack of charisma for effective fear with the understood need for high charisma for effective charm?