@candyman, that was exactly my tactic
Inqusitors do double damage to undead, I managed to max underground spikes (zerock) which does double damage to all spellcasters (necromancers took 1100 damage), and with 2 geiser spells in the first turn (1100-2200 damage each stack x 2)... child's play.
It doesnt seem right to me to have so much ground units in your army (unicorns, black unicorns, dryads, dragons, and only one shooter), this prevents you from using combat spells - ice serpent, fire ball etc.