The bigger point you are missing is it doesn't matter and no one cares. No one in their right mind will try to make the connection that any of those 2-man groupings are good because of Niang. Yet that was your implication. It really brings into question whether you even know basketball at all. You can show anything you want with statistics. Look hard enough and you can find positive stats for about anyone or anything. For you to use this to try to imply that Niang is the reason for that stat just proves that point and that you really don't understand what you are trying to prove.Do you know what plus minus is? It has nothing to do with being the "best" scorer.
Do any of the two-man lineups listed look like typical garbage-time pairings?
Did you read the other post I had that mentioned that the Jazz are overall terrible in garbage time? How does that help Niang have good plus-minus stats?