Spells: Necromancers and Shamans should receive the Charm (anything) line of spells at launch

[Dolalin]

With duration spells such as charms, each tick the monster gets a saving throw and this process is repeated. If any one of these checks is successful (ie: you win the roll) then the spell holds.

This is where you're slipping up. It's not a chance to succeed at the charm, it's a chance to fail at the charm. Or more accurately, the *charmed mob* makes a saving throw every tick against those checks.

Removing the charisma check removes a saving throw for the mob, meaning one less reason the charm can break every tick.