Necro CHA and lulls

[Scoojitsu]

From what I could gather reading through these forums is that necromancers' charm spells aren't affected by CHA.
What about undead lulls tho?

From playing my enchanter I know the chance to get a critical resist on a lull attempt is reduced with high CHA. Is it the same for necromancers?
I'm still trying to make sense of all the -CHA on necro items.