More proof we live in the age of instant gratification ... this Dng isn't going anywhere, I see that the OP finally got it but yeah, you can just run things in moderation. They do this to give incentives to re-run content.
"But people will just run it with trust to not fight others for it!"

First off, "people playing the game" is the end goal ... regardless of if they que with a random party or not.
2nd, you can ask people in your FC if they're willing to run it once or twice to help you get it. Not everyone cares about minions, and some people will help you just to be nice or because they want Daily Tomes. You don't have to go balls-to-the-walz hard to get it just this second.

That's just my advice. I farmed it because I wanted to practice 90 jobs myself.