First of all, well played to you and your team.
However, you just blew past with maximum DPS. It's too restrictive to expect every team to pile on DPS toons like this to quickly kill golems. This is why I wantedb higher starting room damage which will hurt DPS classes and a more constant and earlier (but not spammy) Mass Teleport.
ATM it's too easy to burst it down but near impossible to sustain an average DPS team.
On the other hand, bosses are balanced for 5 players so it isn't bad that it's easy for you with 6 players. Zwieb also doesn't want to make world bosses particularly difficult.
Post the replay and we could use that in determining balancing issues. Also, it would help if you could say in what ways you want the boss to be more difficult. Currently there's just 1 or 2 of our groups who've actually beaten the boss (with 5 players) and have added to the discussion.
Just out of curiosity: How many of you koreans are playing gaias? I'm guessing you guys are on the M16 server. Is this a set team?