That's not me, but...
The Cona was made to be used with the CXs, so that part of the equation is fine.
The
MCL2P, on the other hand, was never intended to be used with more than
one pair of speakers, as you can tell from it only having a single pair
of speaker connectors. It's not the most powerful amp either.
Also, if you plan on using four CXs and a Cona in a single setup, I think it might be better to consider a single pair of proper speakers instead...