In case no one knew, the dice roll effect that copies the domain you're on to another spot also copies the events that the domain you did had. So, Box got 3 Ruan Meis because he copied the first Ruan Mei domain, went to it, and then copied it again for a third time, not because of luck unfortunately. Still a killer run. Edit: Forgot to mention that the copying is not exactly the same, as the events may still vary between parts when copied.
As an Expert, i would say... u suck balls, I had runs with -12 Diff CD -21 without Ruan Mei Blessings and without big Dmg boosts (to be exact 0%)... and without Healer