k this is very simple guys, kill all 4 stewards at the same time, this can either be done with mez or with a good tank, (they only change if they are not agro'd) could even possibly use root. It is doable few of our tanks are wearing the bp's, got the 2 handers scouts using the pauldrons etc. Most of our guild does this event everynight cause it drops nice stuff.
Go back and talk to the dragon maybe rather than trying to kil it once he is released, and hear what he is trying to tell you.
Vormulac Unsleep
Guild Leader Shattered Moon
Neriakithicor