You know, I just had a thought, and everyone's going to be galled at me, but consider this. Mechanically a spell is a spell is a spell right? Makes no mechanical difference whether it's a 4-shift fireball or a 4-shift wind blast or a 4-shift fissure. So if you just want to skip the actual enthralling and just assume that he is for some reason spectacular enough to pull that off on the fly, what's to say that the description of his attack spells is simply him directing a mob of enraged people. A 4-shift "Howling mob" attack spell if you will. Just a thought. I certainly wouldn't suggest this for a PC (obviously the amount of practice one would need to get this good at this would not be PC friendly) but it might be interesting for a NPC villain. And of course if you want the PC's to stumble on his control ritual then this isn't the way to go, but if you want quick and dirty mind magic directed (indirectly) at the players, BAM.
Now that I'm thinking about it that could also be a really cool direction for a white court vampire to go. Take channeling and simply run it as a much greater ability to control others through your emotional mind whammy. A rage Whampire throwing enraged mobs of people at the players, a fear Whampire starting a stampede, a lust Whampire dragging the players into a crush of writhing bodies.... Interesting thoughts.