I know there was some talk of LAX to SIN on this thread. I saw prices of $510 LAX (v class)-PVG (v class)-SIN (b class) -PVG (v class) -LAX on MU.
According to my calculations, this works our to approximately 18K MQMs, 9K RDM miles, plus medallion bonus. It's about 2.9cpm. Medallion Mileage Bonus is based on Base Miles earned: Diamond - 120%; Platinum - 80%; Gold - 60%; Silver - 40%
Both connections, however, include at least a 5 hour layover in PVG. Many dates in 2019 available in Feb, Mar, and April (didn't check after that).