On the avantis for a church service, I have a free aux mix I want to use to parallel compress all the vocals together. Is there a way to route the Aux to the main LR?
No, that’s not possible with Avantis either, since Main and Aux work in parallel.
But you could consider sending the both signals into a Matrix and using that mix.
The compressors have a built in “parallel” path. There is a wet and dry gain setting (part of the compressor settings) that you can use to “dial in” the amount of compression you want vs the dry uncompressed signal. I don’t recall if you can assign this wet/dry ratio to one of the user defined encoders, but if you can that would be the easiest way to interact with it.