I would like to create the usual ducking from my vox to my reverb. When I open the side chain in my channel input vx I’ve no access to my reverb FX return but group or aux.
That s means I have to put my reverb in a group, it is the only solution.
I use multiple FX for my Vox and I feed all my returns into a group so I can do some BUS compression and ducking. Is there a reason you cannot use a group?
You could also go old school and send your vocals to an AUX, apply your FX on the insert, make it 100% wet and duck on your compressor.