Alternate creation method for a Thundering weapon

[Kavren Stark]

Could an evoker who took Necromancy as a prohibited school use Shout instead of Blindness/Deafness to craft a weapon with the Thundering enhancement? It seems on the face of it that Shout would make more sense for crafting such an item than Blindness/Deafness, since the item does sonic damage, while the latter spell only causes deafness (or blindness, which isn't a sonic effect at all).

[StabbittyDoom]

By RAW someone would have to provide access to this spell for them, or they would have to bite the bullet and be out two spell slots instead of one each day they spend crafting. Note that "Prohibited" only means "harder to cast" not impossible now.

FWIW, if I were your DM I'd allow it.

[The Wraith]

You could simply accept the +5 penalty to the DC for crafting the magic weapon and simply doing it without the spell at all.

PRD -> Magic Items -> Magic Item Creation:
"The DC to create a magic item increases by +5 for each prerequisite the caster does not meet. The only exception to this is the requisite item creation feat, which is mandatory. In addition, you cannot create spell-trigger and spell-completion magic items without meeting their spell prerequisites."

Since a Magic Weapon is not a spell-trigger or a spell-completion magic item, it can be crafted without the spell at all (this is, for example, the only way for a non-caster with the Master Craftsman and Craft Magic Arms and Armors to create a Flaming Longsword, for example).