Alexander's ever-expanding Tome of Knowledge

I'm pretty surprised you didn't throw in the "Way too many skeletons" for the C'tis.

Since Sauromancers have 1 Nature, 3 Death, 1 Random they can chain summon undead. You can even have 1 use relief with a nature stick and the random in Nature. If you don't have your Communion lizards ready.

Or the Eagle Eye, Shadow Bolt which hoses everything but undead in a bad way, especially SCs.

Or the ever fun Rigor Mortis/Relief fest.

C'tis has alot of goodies.