Magic on the TL 3 battlefield

[RGTraynor]

(scritches his head) This might seem a horribly obvious solution, but I'll voice it anyway. Wouldn't the simple answer to you using your mages to ring your city with no-mana zones and Pentagrams be "Then I assault your city mundanely, with infantry and siege equipment and catapults and archers and all of that, and I keep my wizards in camp doing healing and CI3 and making defenses and countermagic and all the things they can do that do NOT involve directly attacking the walls? It's not as if YOUR mages can do squat against me, y'know, through all of those anti-magic defenses."