I've never seen any use for the sword and the shield an evil eye's pet drops. They are enchanters and summon what appears to be the same sort of animation that a PC enchanter summons. Only the floating sword and shield don't disappear when the pet dies. Maybe they SHOULD disappear. Both items are sorry loot.
I've seen one speculation that the animated sword and the animated shield are for an as-yet-undiscovered quest. Or an as-yet-unimplemented quest. They would make nifty components for researching a high-level enchanter animation spell.