I just did a paper napkin calculation of the number of wins LeBron-Bosh-Wade would bring to the Miami Heat.
The three together should produce 39.8 wins. If you add in a team of bench level talent (.345%), they could be expected to win 55-56 games. If you bring in a team of median level talent (.465%), an unlikely scenario, they could be expected to win around 60-61 games.
If they fill out the team with some surprisingly productive role players, which is a possibility given the NBA’s huge market distortions, they could exceed 60.
But the bottom line is they are immediately at the magic “55 wins” that you need to have to qualify as a legitimate contender.