I'm a bit disgusted that my Omega Shell w/ max elemental defense UV can't even block Duke's mace attack. This shield is arguably the best or second best in the game at the moment (Grey Owlite w/ max ele def being the other) yet it can't even block his mace. I cringe every time it breaks through and see a teammate with a plain Owlite blocking it without any trouble. This game's items are so incredibly unbalanced that I don't even know where to begin.
So yeah, which shields are guaranteed to block his epic, world-destroying mace while at full health? Thanks.
I went with a 4-player party today (so Vana was at full strength) and I had nothing better than a fully leveled Wise Owlite (4*). It holds against Vana.
I've always thought shields were weird in this game. In the beta I was using a Heavy Plate shield and I was so unhappy with it. If you can't block 3 attacks with it, then all you can really use it for is bouncing monsters away (into your teammates of course). Owlite seems to work better for me than Plate. I've never had Omega Shell.