Hello, James,
it is possible to operate the system only with the software and two touch screens.
But I recommend to use at least one IP8, because real faders are simply safer to use. I do this for smaller jobs, where e.g. only a few speaker microphones are used.
The PAFL can then be reached via the headphone socket on the mixrack or via the XLR outputs. Alternatively you can output the PAFL signal via the digital 128channel ports, e.g. via MADI or Dante card.
Then you need to figure out how to get this signal to the FOH. If you don’t have a cable link here, you can do this via a radio link, but it should also work via Dante Via, or via the now quite numerous 2-channel playout devices for the Dante network.
There is always a solution 😉