Karrnath's army is extremly poor of clerics, but rather well supplied with adepts.  An adept battlemage usually prepares Obscuring Mist and Sleep (though in this engagement they'll prepare protection from evil instead), and equips an endless wand of Scorching Ray, perhaps with a couple of endless wands of Burning Hands.  Adept battlemages typically are used mounted, where they use their mobility to deliver precision strikes against enemy infantry, and their big wands to attack officers and monsters.<br/><br/>Chaplains prepare bless and as many cure spells as they can get their grubby mitts on, often equipping a wand of cure light wounds or protection from evil.<br/><br/>Having at least 1/10th of your unit composed of adepts and battlemage type units increases the unit's magic rating by 2.