Tanks "Hold the Line"

[CGMidlander]

Their defense is already inherent and without tank stance, their burst numbers are on par of that of actual dps classes on top of their better survivabiliy.

The defense already has the advantage in Seal Rock.

Actually...
It's little known and counter-intuitive, but defense doesn't do jack in PvP.

For both Frontline and the Wolves’ Den, physical defense and magical defense are nullified, and battle balance was adjusted based on this. Due to this, Foresight, Protect, and other actions that boost your defense will not have an effect during battle.

I will be compiling your feedback and forwarding it to the devs regarding having this information appear in-game.

I only learned about this a couple days ago, actually. Someone in PvP told me Protect didn't do anything, so I looked into it and found that.

[CeveArthu]

Actually...
It's little known and counter-intuitive, but defense doesn't do jack in PvP.

I only learned about this a couple days ago, actually. Someone in PvP told me Protect didn't do anything, so I looked into it and found that.

you are confusing Def and MDef with job resistances, here is a picture for your convenience (added in patch 2.4)

[CGMidlander]

you are confusing Def and MDef with job resistances, here is a picture for your convenience (added in patch 2.4)

Maybe I should be more clear.
The defense stat doesn't do anything. (So stuff that augments it, like Foresight and Protect, don't do anything)

The vulnerability thing is different from what I was getting at.