The system needs a re-think. Just dumping 100 mentors onto the channel randomly, and having only invites for the sprouts just ends up with 100 mentors and 10 sprouts. If mentors need to go on the hunt for sprouts, they need to request to join at a convenient time or the sprouts need auto-inviting. Both need to be able to leave/join as they choose. Mentor roulette also makes no sense to me - all I've been getting is roulettes for over 50 content, rarely see a bonus either, so it's not matching with sprouts or even dungeon first-timers at all.