Well, the fail proof part depends on which type of receiver solution one comes up with - and fail-proof is not what I'm asking for at this point
I have a miracast dongle that I know I can cast to from my Galaxy Note 10.1 2014 which is running Nougat on a lineage os basis (Resurrection Remix). I don't have any device running stock Android 6 to test with, but I know that while my Windows tablet should be able to mirror to the dongle as well, it won't work, so there is an annoying fragmentation.
So I'm not looking for a ready solution at this point, but would be happy to hear
1) if there is an option Cast in the Display submenu of the Android settings on the Max2
and as a possible next step
2) if anyone with any form of miracast/screencast receiving service (Smart TV, Android TV box, I think in principle even other Android devices like tablets/phones might be able to act as a sink/receiver for the cast) could check if their Max2 recognizes those receivers and if it cab successfully connect to them.
I'm well aware that finding out the combinations that actually work is a non-trivial next step, but it would be helpful to know if anyone manages to get that far at least, in order to see if the hardware is in principle available.