On a given game, adding that week team to your schedule "that day" would affect your rating for that day by moving down because it wasn't considered part of your schedule until it was played.
If you take out that variable, you are always better off winning the game which would have a net positive on your schedule.
The issue people had with RPI was if you played a low ranked team it hurt your overall rating compared to teams who played stronger SOS.
Now, SOS is basically meaningless.
The ideal now for NET score, you should play 12 non-conference games against teams ranked 300-353 and try to beat them all by 80-100 points. Then go through your conference and have your "average game" be a loss of 5 points across 20 games. With that, you would be a top 5 team for efficiency with a efficiency spread of over 25 points.