We've been using an XAir18 controlled by our I-Pads for 2 years now but it's got no track-recorder.
We also have an XR18 mixer. Our mixer has a USB interface with 18 channels.
We recorded our rehearsals with a DAW at the beginning (the inputs of the Mixer) and together we could do the remix from the auditorium on a tablet (we have a rehearsal room where we can play at full volume).
Of course it's only a rough adjustment at first but good to get a feeling for it on the one hand and on the other hand it offered everyone the possibility to hear themselves in the overall mix.
Our goal was to get a basic setting, which we don't have to change anymore with the GIG and everyone knows how to play his volume with the individual tracks.
With the first GIG's we had a technician who did the mix and adjusted it more precisely.
He also made notes where the individual musicians had to make adjustments.
In this way we achieved a usable mix where we only had to adjust the volume at the different locations.
Dynamics due to the different pieces we do on our instruments. Especially the drummer is very challenged.
It tooks time to be familiar with this - but it works fine now, So we do not need a sound technician anymore.
Not the best - but a practical solution.
The personal monitor everybody can controll by his mobile phones. (We use 4 small nearfield monitors)