Adding comp to wedges or IEM’s isn’t really the done thing. Why would you want to do such a thing?
Putting compression on a vocal mix can make it tough from someone who “works the mic” when singing. If they hear/feel themselves getting softer or at least now getting any louder when they sing louder dynamic parts they may start pushing harder.
I guess if your not singing…..maybe???
In the full front of house mix a little compression can help tighten things up.
On IEM’s peak limiting is a good safety net, actually I peak limit wedges as well.
We are talking about post fade here, when post fade, the signal is normally post all dsp
This is for Delay Lines, Speech Monitoring, Feeds to Translaters, Zoom and a million other usecases where you really want all dsp in that post fade aux. Monitoring is prefade, without Comp, I agree, but postfade auxes need ALL DSP.