Mileage Run Discussion - Worthy Mileage Program or Deal for Multiple NRT<->LAX Flights?

I travel monthly between LAX<->NRT (Japan) and have for the past year. I plan to continue for at least the next year. I've already cleared Star Alliance Gold by way of Singapore Airlines. However, I know that I'm not really taking advantage of any deals....and I'm wondering at this point what would be a worthy mileage program or deal worth looking into. I figured this would be the best place to ask since there are so many seasoned, knowledgeable people here. Please let me know whatever suggestions you may have. Thanks!!!
Best,
Tony:confused: