@sinker:
Fair enough. I'll downgrade your sin from "making magic overpowered" to "favouring attackers over defenders".
Seriously, your approach isn't awful. I just don't like it at all.
@Silverblaze:
Let me make sure I have this straight. You're saying that
1. Thaumaturgy is horribly unfair.
2. Evocation and Thaumaturgy should be roughly equivalent.
3. Therefore, Evocation should be horribly unfair.
Is that a fair summary?
@computerking:
I think you are approaching this from the wrong angle. The default is not, "you cannot defend". The default is, "you can defend with Athletics".
@ways and means (and everyone else):
Let me explain why I feel so vehemently about this.
First of all, I have trouble imagining a reasonable justification for an attack against which Athletics is ineffective. You can dodge explosives and bullets, and what spell is harder to dodge than that?
But that's not important, really. It's a minor point.
More importantly, I just don't feel it's fair.
Being good at physical defense is expensive, but doable. This ruling makes it essentially impossible. What's more, it gives a rather huge mechanical advantage to wizards willing to adopt certain descriptive approaches to their spells.
Those are both bad things from a balance perspective.
So I say, let them use Athletics even when it makes little sense. BS it if you have to. Because it preserves the balance of the game.
This approach of mine is inspired by that of the White Wolf Exalted forum towards effects that ignore perfect defenses. It is widely agreed there that with a certain magical ability it is possible to use a spoon to completely block a nuclear explosion going off inside your brain. Because if it isn't possible, then the game becomes completely unbalanced and supposedly-powerful characters get splattered in one hit.