Don't know if it's changed, but you used to be able to enter guild dungeons during WoE. Hide an Emp down there and stick a couple dozen powerful monsters around it that automatically warp back to it if they go too far away.
Change the castle, keep the guild/economy. Yum.
Marivel, Sidewinder - 99 Lady Sniper
Melody Vilente - 99 High Priestess
Yuugi Hoshiguma - 99 Champion
