Also - if looking to make the same trip with AmEx MR points - you can transfer to ANA and book a roundtrip on United for 55k miles/AmEx MR points. ANA passes along Lufthansa's fuel surcharges, which United does not. So if you want to book a flight on LH metal, I'd recommend you use United/UR points; if on United metal (and assuming you have roughly equal MR/UR points), use ANA/AmEx points.