If you’re the kind of person that likes excessively complex programme rules and your travel from SFO take you over the pacific, then aiming for JAL JMB JGC sapphire/crystal may be for you. Whilst qualifying for it the first time take 50000 flyon points earned at whatever the current whims of the JAL team are this month - once you are there renewing OWS status only takes the spending of 5000 miles a year.

be warned jal are changing the terms of the status programme from Jan next year so YMMV.