I look at the rewards from it and I'm unsure of why I would every participate.
I get more money if I fight a world boss even when the combativity cost is double.
I can't get a girl from PVP
I'm aware you get an item from fighting, but the item is random enough from what I have seen it's not a way to seek out a specific item or even type of item.
The gear and boosters for PVP could potentially cost a lot of Kobans.
Is there a reason to engage in PVP that I'm missing?