This game doesn't really make it clear what significance defense and status resist has.
I always die in 3-4 hits regardless, or take 10ish seconds of status, and vitapod pickups seem to have a bigger influence than armor.
I mean I can do Vanaduke in Proto, I just have no health barrier to survive burning or more than 2 hits, it seems to come down to health bulk.
In the end I just went with the Choas set, and I love it. Maximum charge rate and Maximum damage, it really helps as a predominant gunner.
I only find myself dying with it in situations where I'd have died anyways.
So what's the point? Really? Minor min/maxing in PvP? Die in 1 less hit than your enemy?
I'd love it if armors had variable 'overshields' that comply with their specific defense focus, so a normal/shadow armor would visibly absorb the amount of shadow damage that it shows itself to be overlaying on your remaining health bars. It would just be so much more clear and satisfying to see it working in a way that's not so full of mystery and superstition.
Yes, armor can provide you with some good offensive bonuses like damage increase, attack speed increase, charge time reduction and even movement speed increase, they can greatly enhance your knight, wich is what most people that know what they're doing look for in armors.