[Zen]

Just an Idea: Perhaps you could load up the "Hill" with customary anti-SC troops and equipped units. Throwing a magicless Pretender with SC attack equipment (Forcing the Pretender to fight instead of cast until fatigue) with some Mandragoras and some flying resistant units (Bane Lords with equipment might work) to stop the cheese Wrathing of the Hill.

You could also try giving some commanders some Soul Contracts. So as time goes by there is more and more of a force to deal with at the Hill.