Woah that is really expensive. Here is what I would do. Go down to EWR and pick up a EWR-DTW-MSP-HNL on NW roundtrip for 450 all. Then immediately nest that with a HNL-MSP-DTW-FRA roundtrip at 750. That will give you about 30,000 EQM for 1100 or so. The fares in question will pop right up if you set the search paramters at farecompare as EWR-HNL and HNL-FRA. Credit the miles to DL.

Try to spend as much time on NW's A330's as you can. (Thus you may want to forgo mileage to take the MSP-HNL 330 flight)