I stand corrected, 87.5% is the cap my fault I was 7.5% off! But still, -87.5% MDT, 45-60% block rate (-75% PDT while blocking) and 310 shield bash. Most versatile shield in the game. Yes, it might not have a high block rate as Ochain, but it is still very good.
shoot me if im wrong, but i was told that the magic dmg taken from the aegis is not applied to the cap. which means you could have a -95% mag dmg taken >_> ooook