Trival Loot Code.. TLC.
If you kill a mob and someone in the group does not get any experience from it (ie: green to anyone in the group) the TLC will block any Magic tagged items from dropping.
*Most* tradeskill items are not "Magic".
*Most* Epic drops are.. and mobs are green to 65s and 70s.
To allow for a way to solve this problem, raid mode was "temporarily" (*winks*) given the extra feature of bypassing the TLC until a permanent solution could be found.
So, find a friend.. or a bazaar trader.. to raid with and pillage away.