Wait have your lost your mind? 6.8CPM is a great 1st class MR not a COACH MR. Yeah yeah hang on and look at the number 1st then why you should at least look at this:
8743+MQMs at 6.8cpm (more if other routes)
Bookable on Delta.com
DM yields 19,672 Skymiles per CWSI.net!
Now my Scandinavia sales pitch! You are talking Thursday and Friday off work yes. But, you are getting most of two days in Oslo an amazing city to visit. You are pulling in a boat load of Skymiles as a DM, PM or GM medallion that even at 1 cpm value could bring it down as low as $395 net cost or 4.5CPM. Want to stay for a week? The flexible dates show you can do that too and travel around the area. September is still a very nice time to visit Scandinavia and the lobsters are in season 🙂
Other bits. You can get higher yields going in/out of NYC co-terminals but you may NOT want to do that so be careful. Also, Delta.com does tend to offer up the airport south of OSL (ie TRF) so be CAREFUL when booking unless you want that airport for your arrival/return.