As far as i can tell the pets access the owners spell list, mage pets cast other mage pets, wizzy familiars cast more familiars ect. So as i stated ealier take the pet spells away from the NPC's to fix the issue.

The dervs are working on 5. so i doubt there gonna take the time required to fix a bug with 4.4.


p.s. If you manage to find another fix post it most of the servers have solved this problem the way i have stated.