There's various ways to skin that particular cat, yes.
You could also let LANDesk delete duplicates as part of DB maintenance (this is also covered in the article I linked above), depending on what attributes you want to specify (so this gives you that freedom). By default, DB Maintenance runs at 11 pm every night. You can find a direct link to the relevant section -- HERE .
There's a plethora of ways in which this could be address, and no single one is "more right" than the other really - it depends on which one works the best ... for you .