I've done this dungeon close to 20 times with the duty finder, mostly as a BLM, and have had only one bad run. It's in a really nice sweet spot of people doing it for the first time for the story (which gives everyone bonus EXP for bosses) and people running it repeatedly for gear drops.

Of course, I also have zero obligations outside of work so I just enter the queue when I get home and then do other stuff.