While I have My Fader 3.x on my iphone, I don't use it, so my iphone is available for airplay. I'm doing three Senior shows this year. (So Far.) And at least two of them require sound cues that airplay is too slow for. I've bought Tango and it seems close to instantaneous, so with a few rehearsals I will know for sure. If it works with everything else, I should be fully WiFi to the system for all of my shows. The Show this weekend is only a play and I don't think there is any music. (Show is this Saturday, it's a bit late for major changes.)
Tango is fairly cheap and looks so functional. Worthy of serious consideration over airplay. When I've had more experience with Tango, I will report back.