8k def doesn't make any difference?

[asianmuminlaw]

I just got a full set +8 HnC Gambler and decided to solo Einhorn dungeon
first boss kill me with one hit...? Is this...normal? I thought with 8.7k def I can do it comfortably....

[Luke1606]

Well, Heavenly and Chaostic set is sure to give defensive boosts, but you still need apostle buff and more to do solo dungeon cause their defensive damage increase (DD/DDI) are poor.