Enlightenment - Using with Shield

According to Nexon Mabidata, there's some sort of buff when you use it with a shield.

I, too, found this ludicrous, Dante, but Mabidata doesn't lie.

Well, I'm no giant, but the wiki is already saying "Must be equipped with a shield in order to use." Has this changed, or is it just some sorta overall buff?

If anything I think the Devs meant to say that "Wind Guard has been buffed", because saying "Using Wind Guard with a shield equipped greatly increases effect" is impossible because you need to have a shield in the first place to use Wind Guard. But even so, loaded Defense+Vales Shield is more effective than using Wind Guard at times IMO, so it isn't really buffed that much from its previous state.

That does seem logical, since any more than 100 Def/Prot and 60 M Def/Prot is rather farfetched. Hidden extra bonus is possible, too.