Our party is planning to fight a powerful demon with dual-wielded vorpal weapons (I only have limited knowledge of its stat block, so no spoilers please). Those weapons terrify me. We're planning ways to get through this fight with a minimal risk of decapitation. This enemy, as a powerful demon, is also expected to have sky-high saving throws and spell resistance, so most of my sorcerer spells won't be too effective against it.
One strategy I am considering is to deprive it of its weapons. Of the spells I have, disintegrate looks like the best bet. If I hit an object and it fails its saving throw, the object is instantly destroyed. As an attended item, the object would receive its wielder's saves, so it will probably pass the save, but the 5d6 (average 21) damage on a successful save is probably enough to destroy or severely damage the object anyway (see weapon hit points).
I want to disintegrate my foe's weapons. But there is something I am unclear on.
- Can I even target the weapon? If so, what would I roll to hit the weapon? The Armour Class for objects seems to assume an unattended object, and isn't the touch AC anyway. The sunder combat manoeuvre, usually used for destroying attended objects, is for melee weapon attacks, not ranged spell attacks.
(I also want to know whether the weapon benefits from its wielder's spell resistance, as if it does it makes this strategy less effective, but that is a separate question.)
If answers boil down to "ask the GM", please provide suggestions which I might pass on to the GM.