Does +Cha effect only Charm, or Mez also?

[Ropethunder]

From what I understand it doesn't affect the resist rate as it does whether the mob will decide to attack on resist.

There is a method "PassCharismaCheck" that occurs on resist that uses the following formula:

MobR = ((((MobMR + MobLevel) / 3) / MobMaxMR()) + (RandomFloat(-10, 10) / 100.0)

CasterR = (((CasterCha  + CasterLevel / 3) / CasterMaxCha) + (RandomFloat(-10, 10) / 100.0)

if(r1 < r2)
    Result = true

..

if not PassCharismaCheck
    AddToHateList

So, yes. Charisma can make a big difference whether you live or die on resist after taking into consideration the mob's level and MR. Level discrepancy is much more important and will result in critical failures much more often if you try to lull something that's yellow or red to you.

This is from the EQEmu source code so it may have been changed for p99.

There is a similar charisma check every tick against the mob level, mr, and then charisma when charming.