[Nikelaos]

well inside a battle where the enemy has alot of mage support (i'm sure most of us know this can be very deadly mid/late game) rain of stones is one that seems to come up quite useful, though you will need some way to protect you're troops/mages and if the enemy mages have high hp like R'lyehs illithids, the big shambler mages atlantis has (basalt kings, angakoks...etc) or whatever they may survive the spell and need you too go through more risk and batter you're remaining troops yet again to get at them.