My setup with bandhelper on a iPad mini retina. Bandhelper sends program changes true a Iconnectmidi 2 to The Korg Kronos that is in setlist mode. And Some switches from The pedalboard go through mainstage back to bandhelper to switch songs up and down and scroll my lyrics and chords .
The Korg Kronos switches all other MIDI gear like the Nord stage 2 the MBP with mainstage and the x32 rackmixer . Mainstage controls everything Again as Back-up so i Will be Shure all my midi gear is in the right patch.
The reason that bandhelper switches only the Kronos has 2 reasons. One if bandhelper or my iPad crashes i can select all my patches from The Kronos touchscreen and second i have Some songs that have more patch changes i step through them with my pedalboard switch without changing The song in bandhelper.