Board Thread:Questions and Answers/@comment-5896096-20130104120044/@comment-5706972-20130104133928

I recommend asking for help either from your friends or from your guild so that you don't have to use all of your resources to take out the 600K boss because once you do it will trigger a 900K boss (and then a 1.2M boss when you defeat the 900K boss). The good news is that you don't have to deliver the final blow for the others to trigger - as long as you discover, hit at least once, and it is repelled you get credit for defeating it.