STOP NERFING EXP GAINS FOR ROULETTES

[Naoki34]

It is the bonus of xp proportional to your level that is interesting for the leveling roulette, but 1x per day.

It gives you easily 1/3 of your xp bar. Apart from that, it's useless, once you reach level 71, the coolest thing to do if you want to chill is Trust System.
When you don't want to sprint from the beginning of the dungeon to the final boss, this is the best. You have to take the time to live... or playing with friends, but I don't like anyone.