I'm all for it. What I like most about your idea is that it takes up to a whole month for a guild to obtain the WoE items, (depending on whether they keep the castle or not) and even then the drop rate is quite low. This effectively makes WoE more attractive and preserves balance in game play. I'm not saying that the new unique WoE items will be overpowered, I'm just saying that they do give an advantage to the people that possess them.
I guess now we'd have to find a way to evenly pair up the Unique WoE set items. This would change depending on which piece is the most useful but I think it should look something like this:
Prontera- Armor, Boots
Aldebaran- Aura, Cloak
Geffen- Wings, Cloak
Payon- Helm, Boots
We could add accessories to the equation but I don't see a point, I think the Belts that we have now are fine.
