Enlightenment mana shield testing

I heard JP wiki says Mana Shield still factors in Magic Defense? I have 97 Magic Defense, 50 Magic Protection (46% Magic Damage Reduction), 676 Int, and Rank 6 Mana Shield. I didn't run enough tests on this but weak Skeleton Squad explosions do 1 without and 7~ with while strong hits 120~ without and 150~ with. I didn't go unarmored nor did I bring any potions for pot poisoning.

I think it's just hidden shield stats and defense skill with a shield which lower damage from a short test on ice sprites with armor, without armor, with shield, without shield, defense with shield, defense without shield.

Oh yeah, I forgot about hidden shield stats. They're so... hidden.

My test with the Red Spider, Kite Shield has 15 passive defense against melee and I was taking about that much less damage, so that seems quite accurate. Would it be safe to conclude that MS doesn't take hidden shield stats into consideration?

I don't know about passive, but the hidden shield stats makes ice sprite 23 damage melee attacks with mana shield on without shield into 1 damage melee attacks as does using the defense skill with a shield with mana shield on. I take 1 damage without mana shield on from both its melee and magic. The damage was only reduced with shield without defense skill loaded on melee attacks but not for magic attacks.