Just use the $iif to check the number of clones that you already have, but stick the %x_match in there...

Code:
echo $colour(join) -lt $target * $nick ( $+ $remove($address($nick,5),$nick,!) $+ ) has joined # $iif( $ialchan($address($nick,2),#,0) > 1 , %x_match %xnicks )


Or, if I read your question wrong and you don't want the join echoed at all, just stick it all into the $iif.

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