Just got my water (blood) blast/dark armor sentinel to 50.  
  
I know a lot of people on here dislike DA but I find it fun.  
I run cloak of fear, oppressive gloom and the dark epic pool to provide -to hit debuff. I play from the scrapper position so I'm useful with my auras.  
While soft capping the defenses will/would be a nightmare I wonder if its needed.  
My resists are decent base, including a 60% psi resist with 1 set bonus and cardio alpha.  
  
I think if I focus on resists instead of defense I could be a decent off-debuffer while still providing AoE.  
  
What are your thoughts on this?  
  
Ultimately I have fun with this character so if you want to rail on its that's fine. Still gonna have fun!