"HIT N' RUN" GOLEM
The Golem is mindless and has astral skill, making it a prime candidate for the spell Astral Tempest.
The Golem will need +2 astral skill. I usually use a starshine skullcap and a crystal coin, but other items or empowerment will work fine.
Cast Ritual of Returning so your Golem doesn't get hurt.
Place Golem at rear of battlefield.
Teleport into an enemy army (living armies, obviously).
Upon entering combat cast Astral Tempest - Body Ethereal - Personal Luck - Astral Shield - Twist Fate - then "cast spells". Make sure you have at least 4 pearls on the Golem for the castings.
This should get you about 3-7 turns of bLasting versus the enemy army. The more troops in the army the more damage will get done!
As soon as the Golem takes a hit, the Ritual of Returning will send it back to the capital.
Rinse, lather, repeat.
If the enemy has flying troops they may tag the Golem fast and send him home. Avoid that army.
If the enemy has a strong astral mage ready to Magic Duel, it's possible to lose the Golem.
Other than that this is a tactic that is hard to stop, and will make your enemies pull their hair out.