This NM is actually very easy. Beat it with 9 the day it came out. It's all about tank position (2tanks) or a very good stunner to stop Mega Scissors (Hate Erase).
Now if only we could get some decent loot to drop XD seems like all the 50 man battles for 9hours get the good stuff, and the < 10 member battles get Griffon hides or Coral Fragments.