You are looking for status miles from a fortress hub for under five cents per mile, which generally is not realistic. MSP tends to have high fares and geography does not work in your favor. Anything with an M or A/P fare for 150% MQMs will be too expensive, which leaves a lot of Europe and Asia as possibilities if you can find a really cheap fare. Your best bet might be a TPAC RT to HND through LAX, which is likely to be much cheper than NRT flights.