You know, that's what I thought exactly one minute after writing the post before yours.
If they weren't the focus of the story... maybe they could be valid villains (although not Big Bads), and I'd be glad to see them cross swords with the Scribblers. After all, the only interesting thing is that, despite being epic level baddies who zombified people / conquered nations quite a lot... they eventually got killed and defeated (Haerta looked fairly young when she died, too). So it wouldn't be stories about omnipotent evil beings that never get what they deserve.
The sorcerer is still silly.