I think you can use M32 and DFAM VCA out for eurorack signal out your synths but you'll need some kind of line level common output. I really like Nearness and simply use dedicated volumes for attenuating with my M32s but there's also other mixing solutions. One thing you'll realize is you'll need to convert the CV of Mother 32 if you wish to use a sequencer module (unless youre just using with MIDI through Keystep) something like Erica synths mscale to get full range.