Resists are based on relative level and the target’s magic resistance.
Critical resists are based on cha.
But you can’t get a critical resist if you don’t get a resist! The game checks “resist?” before it checks “critical?” So if you’re mostly lulling blues and greens, it often works out fine.
Also, you’re right, charisma does not affect necromancer charms. Druid neither.
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