@Hermes GM, what you are doing to the server is awsome: we as players know it, and you know it too.
But this chaotic boss changes that you made into the giran classic server, made them impossible to kill by the reasons above posted.
The korean devs made these changes onto their server, that was opened in 2015. They areyears of gear and leveling ahead of us, so these changes does not work on our server, just made Chaotic bosses impossible to kill, like anthras is.
Right now, its a matter of math: even if all of the come to kill antharas or Chaotic QA or Orfen, its impossible to do it - its math - you cant win vs those defenses, relfect damage and HP regen.
You guys, GM's, are making awsome events, alot of free stuff is being given away for the players that really play the game, but you are not paying any attention to the HIGH level players, top geared players. This new content, Chaotic Bosses, are made for those players. You brought them, we as players found the tactics and ways to overcome this new challenge and all fo the sudden you made them impossible to kill.
Please, bring them, the chaotic bosses, as they were (they were allready insanely strong by the way) or re-work them in a way that they can be killed, even if it takes 1 hour like the OLD anthras or Valakas raid.