Whilst perhaps not the most efficient, I flip back and forth between the arranger and the mixer, just to get rough mix/insert stuff the way I want it. Input is usually in its own mixer if I am working outside the box much (for my own stuff is largely instrumental, and virtual).
But, when it comes to final mix, its all in the mixer(s)… sometimes I will put FX returns in their own mixer. Automation is usally the last thing I do, so little tweaks will send me back to the Arranger page.
I am just getting my head around the “scene” function in the C7 mixer, I like it. 