I do have a very important piece of info to add to the Keeper of Sorrow fight, that will hopefully help others avoid making the same mistake we made.
When the Keeper of Sorrow dies, Tylis Newleaf will show up again. EVERYONE who needs the flag must hail Tylis, and then ONE person needs to say to Tylis, "I am ready to return." If ANYONE says "I am ready to return" the WHOLE RAID will be returned to Maareq's room. Anyone who did not hail Tylis before this happened will NOT be able to get their flag.
Elvyssa, 105 Bard, <Silent Resurgence> Erollisi Marr