wow, my experiences with the dungeon maker were TERRIBLE.
the dungeon maker scale up to 95 is just wrong and it's 100x worse the more players you have.
1 player = easy
6 = impossibly hard hitting almost tripper epic in strength, you can not take on more than 1 mob at a time.
my teams are doing much better now and I can usually stay up in a dungeon maker of my own design where all of the mobs are single pulls.

I was using a team of 6 and the first few tries of groups I could press the ranged attack button and my whole team would be dead before the twang of my first first bow shot.