Similar reasoning I use for my fantasy world, though I make my wizards rare and their powers very limited. A Battle Mage can make an army much better fighters, but he still needs plenty of fighters armed with swords and other weapons. The more fighters he has, the thinner his magic is spread. The longer the battle, the more likely he is to exhaust his magic. He can get another wizard to support him, but the second one must have compatible magic.
All a good call for a limited system of magic with circumscribed rules.
I once told some D and D players magic was inflationary on an economy. They didn’t get it.
Unlimited systems are as much a problem for the writer as the swordsman.
Similar reasoning I use for my fantasy world, though I make my wizards rare and their powers very limited. A Battle Mage can make an army much better fighters, but he still needs plenty of fighters armed with swords and other weapons. The more fighters he has, the thinner his magic is spread. The longer the battle, the more likely he is to exhaust his magic. He can get another wizard to support him, but the second one must have compatible magic.
Scarcity is another twist.