Every move that war and pld use to generate enmity just multiplies the damage of the action by whatever the enmity modifier is. Skull sunder for examole. 200 pot, but has a 3x enmity modifier. So it takes the 200 pot and 3x for total of 600.

Sunder does damage of 200 pot, but generates threat of 600 pot. Just like adding str makes your 200 pot attack do more damage, it is also multiplied 3x for enmity. If you crit you get more threat etc.

tldr: threat is directly tied to your actual damage. So if you want to do more threat, you have to gear more like a dps job. Vit does nothing but make hp go up. Vit and parry are survuval tools, not threat tools. This is why hybrid accs are so good. You get most of the power of str accs (18 vs 23 str each) and most of the hp from vit accs (21 vs 27).