One Way for Y is 35k and PY is 52.5k. I used the Points + cash option and paid 36.75k + $200 +Fee. I am definitely okay for paying addition $200 + 1750 points for a long-haul flight.
But for flights less then 6 hours I would not have pay the extra, and when paying with cash I wouldn't do it if the price is double the amount of Y class unless it has exceptional service and food.