[st.patrik]

Don't forget the classic ways of fighting SCs - curse (Totem Shield), Bow of Botulf, Etheral Crossbow, 'Sleep' if you can get through the MR, Eye shield, dropping cursed items, etc. - don't try to go toe to toe against a magically superior force as Ulm. If you do you're playing to your weaknesses and his strengths.

Also if you have a rainbow mage pretender you may be able to forge some items which will increase your priests' holy power (although this isn't easy) so that more of them can banish demons.