View attachment 3622
This is how I was finally able to get a cue mix that can have FX (Reverb and Parallel comp in this example), all going through Realphones headphone correction, to a separate output to my headphone amp («HP_Cue Buss» is set to out 15-16 on my interface). Note that the listen buss has my SoundID to correct my studio monitors (Main Out 1-2). All run at the same time!
Also, if you add an FX channel. and it is set to Master out (default when initiated) you will see the cue mix option on the track, but you cannot enable it. However, once you set the outputs of that newly added FX track to the FX channel acting as the cuemix buss, you can then enable it and it works. You just add sends to any track you want to feed the reverb, compression, etc. tracks you need. See the attached photo for reference.
Hopefully this helps others.