Yes practice. Not a game... practice. How would you pit the players against each other 5 vs 5 the A and B teams. Then 4 vs 4 vs 4.
5 vs 5
IT vs Rozier
Smart vs AB
Brown vs Crowder
Hordford vs JJ
KO vs AJ
4 vs 4 vs 4
IT vs Rozier vs Jackson
Smart vs Hunter vs AB
Brown vs Crowder vs JJ
AJ vs KO vs Hordford
Edit add wonder if starters vs bench would be competitive?
IT vs Rozier
AB vs Smart
Crowder vs Brown
Hordford vs JJ
KO vs AJ