Does Charisma affect enchanters, Dex - necros?

[Kevlar]

I have no hard data but I think charm works like selling to a vendor. At crappy levels of charisma you get negative modifiers, charm breaks frequently, once you get to a certain minimum level it doesn't have any positive modifier.

Its pretty noticeable on my druid, my base charisma is only like 70. I have to equip some charisma gear to get up to 105 and my charms are a lot more stable. Mob level has a bigger effect than charisma though, whites or mobs that just turned dark blue break a lot more often than lower level blues or light blues.