Myself and at least 3 other people have been trying to get this done for a while. It requires a partial alliance (i.e. more than 6 people if you want to have an easy time of it) and it's been REALLY rough getting anyone other than the 4-5 people we already know. We're stuck on it. We need it done to get to the last chunk of WotG missions.
Here's a wiki link: http://wiki.ffxiclopedia.org/wiki/Howl_from_the_Heavens
If you're interested in doing the quest for yourself, or if you're just generous/magnanimous/philanthropic enough to help out a few people who have been wanting to get to the next stage of WotG for a few months now, send myself or Darkodin a tell in game. We'd love you forever and ever and ever. D:
Thanks!