Having the option to use Vigor in some spells

A-are you sure physical damage doesn't only take into account the enemy's physical defense instead? I mean, if it was that easy, I would think B-Run wouldn't have just told me "Oh just check this box"...
Also, I have a physical damage with spell power 111 doing 120ish damage, yet Fire, a non-physical spell with only spell power 21 is also doing around 100 damage. Considering that magic defense is usually much higher than regular defense on enemies (usually around double), and that my caster and my swordtecher have a somewhat similar magic and vigor stat (48 vs 43), you would think the physical attack would be leagues stronger, unless it was still using the magic stat of my swordtecher (23).

I'll be sure to ask them :)