What-if Ruin was an Auto-attack

[Itseotle]

This makes alot of sense, but the WD on the mage's weapon is Magic Damage. All they would have to do is slightly buff the magic defense on the enemy, so it would even out.

No they would add a physical damage stat to mage weapons. But really, casters do not need auto attacks of any form our balance. They cast spells, that's why they are spell casters. If you play an attacker, such as monk, then you get attacks.