I know you won't agree with me but stacking SS as well as DET on a Paladin is quite something! Of course you need ACC to cap raid instances too. As parry is concern about this topic, having a shield with moderate chance of blocking will cope your lack of parry stacks. That's enough to mitigate damage from enemies. The only priority in your progression is your iLVL and balance of stat stacks. Too much isn't always good ;P