You know it may be optional but time taken does not equal challenge, just because something takes an hour or more without any change doesn't make it hard it makes it tedious - I made one mistake with the power I picked on the 17 floor and then couldn't complete it due to my own incompetence.
Mage Tower and Visions were better than this in terms of how they played and difficulty.. this just feels RNG.
My issue is one minute your killing mobs let right and center then all of a sudden it take forever to kill trash.. still do it just long and boring.
I think I am just pissed I spent an hour in there to fail before the boss, honestly you are more likely to die to the trash floors than the bosses.
I don't mind if they don't change it but its not a challenge just long and tedious. (probably more salty at the moment)