WTB 15 man raid answer as well! the developers keep mentioning that they would like to try this, but often say that they dont want to interfere with 10m and 25m groups that guilds have set in place, forcing them to either scrounge for more players, or make cuts to their core group. my answer to this is - test it out on raid finder. that doesnt interfere with any guild core groups and would be a nice way to test out what many to believe is the "sweet spot" for a raid group number. gogo 15m raids!!