http://www.project1999.org/forums/sh...ad.php?t=14667
Q: What about raid mobs that are spawned by a combination of other mobs?
A: In the case of a raid mob that is spawned by clearing an area (Example: Azarack Island in Plane of Sky), the guild that did the clearing has the same consideration as above; That is, 20 Minutes to engage and 1 attempt. In the case of multiple guilds contributing significantly to the spawn of the mob, the mob is first to engage by any of those guilds.