Well, for the past 30 minutes or so I have been walking around my room with a 135mm f/2.8 Elmarit (the one with goggles) on my M5, and a Metz 40-MZ-3i flash (with 4 AA batteries) in the hot shoe, and an Arca Swiss type quick release tripod plate on the bottom. Using the Nikon strap.
I'm not dying with this setup.
The hip actually takes up most of the weight when you wear the camera diagonally across. The strap is soft enough that it drapes over the the back and shoulder to spread the load.
I doubt that your Nokton is THIS heavy.