This now works flawlessly more or less, I had DX11 mode enabled in my testing. To get this working you need wine6.6+ so I used proton-tkg-6.7 which allowed dotnet452 to be installed. Dotnet452 IS the missing part to get this to work, but it had been broken in pre6.6 wine/proton for whatever reason. After this you can launch game once, if may fail but try again and go into the launchers options screen and enable dx11 mode and whatever else you want (controls here may be finicky, try TAB and arrow keys etc).