Since the panels are going over concrete and the concrete likely won’t be perfect everywhere, you may need to do some shimming if you notice any panels “rocking”, I would dry lay each panel before putting the adhesive down to check, however there are two types of adhesive from SRW, the other one is called “Vertical Lock” and is very thick compared to the much thinner regular adhesive and you may not need to shim if you use Vertical Lock, it is about twice the cost though.
I also would dry lay about 10 pieces at a time to make sure I had a good variation of color/pattern, but that is dependent on which color you pick and Mystique Multicolor has probably the most variation of all of them.