I have no idea what the woe situation looks like in this server since I recently joined this server but I have to say a card against GTB is just not a good idea... HWs are one of the powerful killers in woe. If properly geared or played they can almost kill all classes (yep snipers to its not impossible). What could be done (which is still a bad idea in my opinion) is to reduce a little bit the effect of GTB like 80% immunity to magic, 20% dmg and hws card, mdef piercing items don't take effect. Anti-Coma or other effects remain the same.