Maybe what I said is misleading. I suspect what is displayed on the 70d is very similar to what is displayed on the 60d and the 680. That being said, I recently tried setting my levels visually on my 60d and then listened on headphones which caused me to make further adjustments with the end product being about what I wanted.
About the mounting, I don't see mounting any recorder to the top of a mic stand as practical. What I have found useful is to mount the 60d to a piece of aluminum angle attached to a superclamp that I can position up or down on a light stand used as a microphone stand. If I need the camera to shoot over people's heads, I put it further up the stand. If I'm in a spot where I can mount the camera lower where I'm sitting, then I can mount it lower.
Still experimenting, but I found a cell phone battery case that fits the Ravpower 10400 mah battery I'm using, and will probably velcro it to the aluminum angle beside the 60d.
The 70d would be more flexible than the 60d in using 4 xlr mics, but anything involving phantom power is probably going to practically require an external battery pack for our purposes.