Missing armory link.
and we have a forum for this. I'll move it there.
And 540 isn't a cap, it's a minimum, defense is still probably the best avoidance stat in the game to stack because it spreads out avoidance to help with diminishing returns, grants you Miss which is the best avoidance in game, and gives you added Shield Block Rating which helps in smoothing out mitigation.
Can't say about stamina, your armory link is not present.