Board Thread:Skyrim/@comment-108.220.170.149-20150802214213/@comment-26961414-20160124221816

AzuraKnight wrote: Maybe Nightingale Armor just wasn't meant to have a shield, instead meant to be used with the bow, duel wielding or with the sword and a spell (maybe a Ward for blocking). But maybe not and they just didn't get around to making one.

Based on the enchantments, most likely meant for One-Handed + Illusion.