I've written before about inserting dynamic processing on subgroups but I'm about to write about it again. This is a pretty lazy post in that I'm just going to link to THAT POST and also THIS ARTICLE over at ProSoundWeb that does a pretty good job of summing up just exactly what subgroups are for and how to get the best use out of them.
If you've got a console with subs on it and you're not using them then you're wasting a lot of very useful capacity. Take a little time to get to know them and find a way to put them into service a little at a time so you don't get overwhelmed. Maybe start with a drum or vocal group and once you understand it try patching in compression. You'll never go back.