[Blofeld]

Scout(s) with Herald Lance set to cast spells can make wonders if you're facing Bane lords and other undead thugs.
Or with Phoenix rod, if you're playing Marignon or get fire mages from elsewhere.

If you put Boots of Quickness on them - double the fun.

Shambler chiefs are good carriers for such items - cheap and tough enough to survive a random arrow or lightning bolt.

Blindness is also good and castable by a lowly fire mage.
And the spellcasting AI will actually go for it it when facing fire-resistant foe, which is nice.