I have a build that is pretty much unstoppable. Spine/Dark. With combat jumping. All the defenses and debuffs really help out. And, with spine/dark AoEs, it's great for groups too! But the defenses are enough to make any tank Jealous. Though you will need endurance recovery. The endurance drain for all the buffs is horrible. Makes me squishy if I run out of endurance when I'm exemplared. But, other than that, It's an amazing combo.