Just to play devils advocate I'll go for the magic of the Styrics.
The Will and the Word greatly depends on the strength of the user - Garion, Belgarath & Polgara are all incredibly stronger than their Angarak counterparts. It was noticable that in the Mallorean when they encountered the shamans who raised demons that they were 'unstoppable' by anyone bar a God once released.
When you use the magic of styricum you are in effect asking a god to take a hand in mortal affairs, especially for the 'big' magic. Using that as a reference Sephrenia & Aphrael against Garion would result in Riva needing a new king...
