If (as it appears) you need ~15,000 to get to "real" PremExec, you might consider doing a mileage run on the Pacific side (MSP-ORD-LAX-NRT and back the same way would be about 15,400; going to HKG through ORD and LAX would be about 19,000 round trip) instead of two trans-Atlantics.

Of course, the beer in DUS is better.