First nines, gtb does block the coma tarot card. Switching back and forth from gtb/usak is a great strategy for fighting clowns and gypsies. Next, you can't rightfully complain about one card imbalancing your class. First, you're choosing to play a magic class knowing that there is in fact a card that will null all magic damage. Second, you're relying totally on magic damage. May I suggest the new stave crasher additions to prof? I've seen Crim beat many people who use GTB by simply augmenting his wizard's build to a magic and asura build while forcing gtb and skolls he kills them with asura.
GTB is a card, the administration has chosen to keep it the way it is for ever, so I see no reason to make special rules for this event banning GTB when it has never been banned before.
He said orc lords are allowed. However if you both die you're both disqualified.
Yes, some classes are naturally weak. I'm sorry but there will never be perfect balance in RO. It won't ever be completely fair. What are the odds of me winning something like this on a Priest? Not very good...
Finally, I like the idea of the event Seraphine, but as you can already see its going to spark a lot of debate and complaining.