[Alneyan]

You could also go with the Nasty Golem of Doom, a golem equipped with Returning (Armour of Virtue or the ritual doing the same thing), and casting miscellaneous spells at the enemy army. Astral Tempest is fun, and you can probably add something tougher to make things nastier.

Alternatively, the Chalice should heal Golems just fine, unlike the Heal command, so you could aim at snatching that artifact. It is pretty cheap too, and very useful, so it won't be a waste of gems.