for (@first_sort) {
  if ( &goes_first( $my_server_hash{$_} )) {
     push( @topset, $_ );
  } elsif ( &goes_second( $my_server_hash{$_} )) {
     push( @set2, $_ );
  # more steps if you want...
  } else {
     push( @lastset, $_ );
  }
}
# now go through those subset arrays and print them in turn;
# alpha-sorting is preserved within each subset...