I switched to OpenGL on Ryujinx and suddenly I was around 42-50fps in 2x, using a 3950X @ 4.5ghz, 1080ti. I recommend affinity to 6 logical cores and using the 30fps patch (with optional vsync uncap) until all the quirks in the 60fps mode get fixed. I am now waiting for a 21:9 patch, which would be fantastic for this gem.