[Ironhawk]

Against an Ashen Angel, all you need is some chaff bodyguards to stall the angel for a turn or two and then script your mage to cast Dust to Dust. I suppose Banishment might also work if it was a priest? Not as good of a bet tho.

As for an Earth Attack - thats a tough spell to stand up to. Paralyze, Soul slay, etc would probably be your best bet. Or the spell that kills magic beings? Cant recall what it is. If you are willing to spare a gem, you could summon your own elemental in the battle. In the case of earth attack tho, you really are better off going with chaff commanders like scouts to reduce the chances of a mage or key commander being assassinated.