Consider:
Paul George: 21.7PPG, 3.5APG, 6.8RPG
George Hill: 10.3PPG, 3.5APG, 3.7RPG
TOTALS: 32PPG, 7APG, 10.5RPG
Rondo: 11.7PPG, 9.8APG, 5.3RPG
Green: 16.9PPG, 1.7APG, 4.6RPG.
TOTALS: 28.5PPG, 11.5APG, 10.9RPG
Since each assist necessarily represents a made basket, you can shorten the equation to:
Rondo Green (28.5PPG plus 23PPG from assists: 51.8PPG) 10,9RPG
George/Hill (32PPG plus 14PPG from assists: 46PPG) 10.5 RPG.
...it actually seems pretty fair to me.