ive been experimenting with those cards my self, and i agree that they will bring the spellcasters back however im finding some probs with necro valley and monsters over 2800 attack how are you dealing with them?
Edit: a bit of a suggestion, maybe try adding a big-eye to the extra deck since hes a rank 7 as well as your hierophant you could always summon him. hmm and maybe 1 or 2 magician's circles to spec summon out some more monsters for xyz and what not