What if we got rid of resilience for non-full fledged creatures? Instead, make harm spells go directly to HP as other damage does. For other types of spells (Curse, influence, etc), give them opposed roll based on type.
What if we got rid of Resilience for ALL creatures, NPCs, and PCs?
Non-spell damage (traps, environmental effects, poison) would be handled by opposed rolls vs. the appropriate Ability (Agility, Reflexes, Endurance, etc.)
Non-harm spells would be handled by an opposed roll vs. Resistance (or Willpower).
Harm spells would be handled by using one of the ADPs (or by going into HP for creatures).
Perhaps a new ADP could be created, called Magic ADP, which would be the MRV of the Arcane tree(s). This ADP would be able to be used only against Harm effects. (This would balance out the elimination of Resilience for "magic-users" who don't put a lot of CP into melee abilities.)
So Harm spells could be mitigated by Weaponry (for targeted Harm spells), Evade (for targeted Harm spells), Dodge (for area Harm spells), Deflect (for targeted Harm spells), or Magic (for all Harm spells).
I'm leaning in this direction. The Magic ADP is an interesting idea (similar to what Evilcat was suggesting recently). Such a defense pool would only work against power sources understood by the arcanist. So a mage hit by a necromantic spell who only understands primordial spells couldn't use his Magic ADP. Otherwise, as suggested in the prior post, non-harm spells could be handled by an opposed roll vs. Resistance or Willpower.
I can't imagine too many Harm Effect spells that could be mitigated by Weaponry...like parrying a lightning bolt just won't work.
But, it's possible. For example, a wizard animates an coat tree to strike a fighter, who parries with his sword (breaking the coat tree). My point there is that I don't think it would be possible to list all of the different possibilities of spells, matching each to a specific ADP. Since I'm keeping note of potential "offical" changes, I'd want to think hard about how to present the myriad possibilities involved in using ADPs to mitigate spell harm. I can only imagine the number of circumstantial debates on that one (especially from players)!
And another note: any ability can be turned into a temporary DP, if it suits the GM. This can be an interesting way to simulate chase scenes or contests of will, or when timing is involved. Removing Resilience doesn't remove the usefulness of Defense Pools in many situations. But in the present context, it think it makes sense (and I'm also seeing a consensus here).