I have posted the following in the AA forum, where I received recommendations to cross post here.
I get a different answer from AA each time I ask. My routing is an open jaw-
Lit-Ath, Sin-Lit. The Circle Mapper comes up with 15,817 miles. A oneworld business is 130k(14k-20k miles). Does this routing qualify for an all-partner award (US-Asia2) for 115k? I understand that Athens is not Asia2, but I am using the maximum points required for the trip if it were round-trip from Sin. I do not know if an open jaw is allowed for the all-partner awards, especially where the zones are different.
I currently have the outbound on hold, waiting for the return dates to open up.
Any help would be appreciated.

How many different airlines are you using? I THINK 1W awards require the use of 3 airlines including AA?

Getting to ATH requires using either BA or IB while to get out of SIN requires one of CX, QF, BA, AY ... so no problem qualifying for the Oneworld award (and the requirement is actually to fly 2 OW airlines other than AA, flying AA is optional). As for the original question about the open jaw, my understanding is that the open jaw distance is included in computing the mileage needed for the award -- so there is no advantage to open-jaw rather than fly it on OW awards which allow stopovers. While on other awards the open jaw is a way to get another stopover. A clever idea to use the open jaw to fall below an award tier boundary, and it may work on some airline FF plans but I think for AA the rules allow it but include the mileage in the award cost.

Thank you for the replies. My plan is to use lit-lhr AA, lhr-ath BA, sin-nrt JAL, nrt-lit AA. The return route is to minimize travel time, but the seats are not guarantied until I am able to book in a few weeks.
I was trying to come up with a plan to be able to upgrade to first with the miles I have. (Can't come up with the miles for first on the OW award, but have enough for the all-partner in first)

JAL isnt a member of oneworld so you can't use it on this award. You could use either Cathay or a combination of Finnair and Cathay. If youre not staying in Tokyo, you can take Cathay from Singapore to LA or San Francisco and AA back to Little Rock.

Thanks for the info.