[Axioms 1] Custom Spell Type Eliminating Blast and Healing - How to determine prime requisite etc?

In Axioms 1, there's the magic type creation system. If I were to eliminate blast and healing (designing a magic type to emulate sorcery and wizardry in Hyboria), how do I determine what the prime requisite and the magic item type should be? These are based off Blast Modifier divided by Healing modifier so therefore if I get rid of both they're theoretically 0. Even if I get rid of healing then blast is infinite (can't divide by zero).

In this case, what happens?

Huh. Well, here's an alternative approach you can use to pick prime requisite and magic item types etc:

 

		<p><strong>Source Factor Total</strong></p>
		</td>
		<td style="width:25.56%">
		<p><strong>Inherited or Studious, </strong></p>

		<p><strong>No Code of Behavior</strong></p>
		</td>
		<td style="width:26.42%">
		<p><strong>Inherited or Studious,</strong></p>

		<p><strong>With Code of Behavior</strong></p>
		</td>
		<td style="width:25.44%">
		<p>&nbsp;</p>

		<p><strong>Any Prayerful</strong></p>
		</td>
	</tr>
	<tr>
		<td style="width:22.58%">
		<p>12.5 or less</p>
		</td>
		<td style="width:25.56%">
		<p>As Mage</p>
		</td>
		<td style="width:26.42%">
		<p>As Mage</p>
		</td>
		<td style="width:25.44%">
		<p>As Cleric</p>
		</td>
	</tr>
	<tr>
		<td style="width:22.58%">
		<p>12.6 – 13.5</p>
		</td>
		<td style="width:25.56%">
		<p>As Mage</p>
		</td>
		<td style="width:26.42%">
		<p>As Mage</p>
		</td>
		<td style="width:25.44%">
		<p>As Cleric</p>
		</td>
		<td style="width:25.44%">&nbsp;</td>
	</tr>
	<tr>
		<td style="width:22.58%">
		<p>13.6 or more</p>
		</td>
		<td style="width:26.42%">
		<p>As Cleric</p>
		</td>
		<td style="width:25.44%">
		<p>As Cleric</p>
		</td>
		<td style="width:25.44%">As Cleric</td>
	</tr>
</tbody>