Remove Extremes from Mentor Roulette

[CKNovel]

So mentors will just leave everything not an EX trial because they'd rather fish for the 10 clears per roulette? Most of the mentors out there are only mentors for the achievement rewards. They only want the mount and then they'll discard the crown forever.

Nah. They'll stay for the simple thing because every step, even small, is a step.
But at least if you manage to clear the EX, even if it takes an hour, it will be worth the hour. If you leave a full party you can't queue again for 30 mins.

Currently mentors fish for simple content and leave if they see it will take the whole hour. Making Extreme a massive rewards will make it look like a no-brainer and they would try to complete it.