New Gm and Chaotic World Options

[Luegene Cards]

Ok, I'll admit it - this is my first Shadowrung GMing experience. As such, I've run into a brick wall with one of my characters, and that wall is chaotic world.

Basically - if I understand this correctly - how is any group of reasonably powered enemies going to make their save against this spell? I've been running the game for several months now, and with specialization the group shaman (mouse) has about a 9 sorc skill with a spec in spellcasting. Combined with his magic pool, bonus dice towards illusion spells, and a heavy dose of dice from his magic pool, he can drop a good 21 dice into a large group of enemies with a force 6 chaotic world. His target number is their intelligence and they resist with their intelligence dice against a target number of 6. There is no way that any creature or intelligence 10 or less is going to be anything but creamed by this spell.

Now, I admit that I run a high-powered campaign, but they successfully took out a bar full of 18 high, high powered vampires with body stats in the low twenties by rocking them with +6 modifiers to all their rolls. I did not intend for them to fight the vampires. I assumed it would scare them senseless. But no, the shaman just dropped a quick chaotic world and made all 18 of them effectively worthless.

What am I supposed to do about this? I'd just nerf the spell but, honestly, the shaman is the best role-player in the party and I hate to punish him. I'd jack up the intelligence score of all the enemies, but that's so lame that I wouldn't be able to sleep at night. Any ideas?