What will be the best practice to assemble this components of radial engine by keeping in mind the drawing structure of single Top level assembly.

I was thinking to create virtual sub-assembly of piston, master rod and all and then use their instances to mate. Is it better way to do?

If not sub assembly then copy with mates options to repeatedly mate them is the only option left? Feature tree can be made smaller by using "group instances" but I am worried more about the number of mates that will result because of it.

Complete file is attached if anyone wants to attempt then. How about the possiblity of mirror several components? Here pattern is not possible as they are not on a PCD.