what's worst-case? 5 of their final 10? That still means 6th at worst. We're fine.
Yep, 6th spot is absolute worse scenario.
(Actually, we would not even have to consider this now had the Pacers done their duty, but oh well...)
Having said this, the most likely is that the ranking stays as it is below.

Brooklyn making 5 wins in the last 10 will be shocking... Even 4 is a stretch. Assuming they win 3 or less, we only need Minny to make 1 win to have the 4th spot secure.

Only thing that worries me is that Minnesota has an outrageously difficult schedule playing only with Western Conference teams, which gives them a tiny yet annoying bit of hope. Only 3 of their final 9 are winnable (Suns, Kings, Pelicans; and the cherry on the pie is they play the Pelicans last).

PS Pelicans play both Brooklyn and Minny; it is extremely unlikely that
both them
and Minny catch up with Brooklyn.
PPS The % that Brooklyn finishes 3rd instead of 5th are higher, but in any case they are also rather small.