What route do you think is better ? Isn't one way on UA J Ewr-Tlv 70k ?
Yes, but as DMYD said, if there was availability on United you would book with Singapore for 57.5k instead (this is obviously unless you want to do a plan b). In a regular case you would only book with United miles if you wanted to fly Lufthansa, or Brussels etc., and didn't want to pay fuel surcharges. In those cases a J award with United is 80k.