Well,
Dca’s are an option….
But, not many of them…and having easily setups like multi keyboards and even multi output amps as well…
For instance our guitar player plays 2mesa boogies, and 2 Hughes and Ketner rigs…(yes 4 100watt amps and 4 cabs) and its nice to have them all linked…
As for backup signers DCA is better…allowing to tweak I one is getting louder than the rest…etc…
Both would be Awsome…
Perhaps change the setting to just a follow fader option…
Then if it’s 1-2 select two to follow one…
1-2-6-7 its 2-follow 1. 6-follow 2. 7-follow 6.
Not sure on ah software, but will allow any number of and offset of faders with just one setting per channel similar to thier setup that exists…just pick the channel…