I highly advise the usage of Modality toolkit, it simplifies the mapping of MIDI (and other) controls a lot.
http://modalityteam.github.io/
Just install the quark and look at the tutorials, you create an instance of a modality controller inside your patch and assign controls to it, all you need is a template of your controller that maps all the hardware controls to the naming convention of the library. I believe there already is a template for the controller you use:
http://modalityteam.github.io/controllers/akai-midimix.html
best–