The last stage of this quest is a hell to get all medals, it took me 10+ times to reach the boss on the top once... but then the stage finished before the bottom boss was dead (thanks to the +100 speed from Orchid), i had to slowdown the main party for that to not happen again, but then it was another batch of more than 10 attempts... But overall it's not very hard other than the f**** random nodes.