I mean random group. Personaly I just rush level trying to skip as much monster as possible to complete it as fast as possible.

Getting character level seems to make so little difference compare to weapon and armor lvl that I just reset progression as soon as I seem to hit a wall.

For soloing I can easely understand why someone would want to clear everything but in a goup session, were the goal is to reach floor 51-60 to farm it over and over I don't get. But I'm a noob so maybe someone may explain it to me ?