Yes in most cases 2 superstars are needed. Those Detroit teams had great coaching and amazing team chemistry. The players complemented each other perfectly. .
They also benefitted from an inopportune Karl Malone injury and a Shaq-Kobe season-long feud to win their only title. You need karma or luck or whatever too. Jazz just dont seem to have enough of it, especially with injuries these days.
As for that Duncan model easier said than done. Jazz need to pick a year when the draft is going to be really great at the top in big men and then tank that season like the Spurs did to land someone like that. Even then there are no guarantees that you will end up getting a Duncn. PLayers like that dont just come along every 2 or 3 years.
Jazz just have to hope that one of their numerous draft picks turns out to be as good if not better than Deron and then put pieces around that and then hope that you can emulate the Thunder.