When farming for myth, do you absolutely NEED 2 BLMs or BLM/BRD? I'm having trouble finding parties because 90% of the time I get locked out for not being BRD or BLM. I've noticed yesterday after making my own party that we can pull 2 big groups, do the bosses and quit the dungeon as SMN/DRG SMN/BRD SMN/SMN etc.

What is so special about BLM and BRD for this dungeon?