I am wondering if the following scenario would work under RAW.
Two Tytalus magi wish to test out their combat magics/prowess on each other, and are prepared to risk their lives in the process.
So they declare Wizard War on each other, possibly something about irreconcilable differences on the doctrine of war. They declare they will both bring supporting combatants, and also have pre-arranged that no other Hermetics will be in their isolated, chosen field of battle. So that anybody found at the field of battle is considered a valid target.
Then for a month, or until mutually agreed, throw their armies and magics at each other, in happy slaughter.