As Corwin said, all casters get Dismiss Charm. My problem was that it would only work every 5-6 castings. Compared to spells like Hypnotize or Soundburst, which would knock out 2-3 at least on a single spell. Or Hold Person and Command, which I rarely miss with my Cleric. I might miss one out of every 5 or 6 castings.
My Wizard might find better use of Charm, but as Corwin said there; it's so much more satisfying to toss a fireball.
Also, while it might not be in your Solamnic Code, Peter, but you can just leave the charmed mobs be and move on most of the time. Iji is a bit of a pacifist, which is why she carries a staff, not a rapier. It doesn't draw blood, just break bones.
Often when soloing, she'll leave stunned/charmed/held groups alone, and move on her way.
Of course, when not soloing, she'll still bash in their heads.