I don't know if it helps, but this weekend I booked AMS-LAX in Y for 35,000 and LAX-SFO-AMS (DL, KL) in J for 111,500, total 146,500. Personally I think the J reward fare is a bit high, as there were lower ones for different dates, but worth it for me, as it combined nicely with a cash ticket on the same dates for a lowish fare allowing to travel with the SO!