even when the team wasn't at its peak Stockton kept those guys in games they should have never been in and helped to win some of them. a well placed long range 2/3 or a couple of them in quick succession can change the complexity of the game. you dont need to score 28 if your 17 is timely and you dish like a God.
Stockton had a better career stat-wise if you take totals and per game averages. If you take the stats per 36 mins they kinda even out, except in threes (Nash shot 3.7 to Stocks 1.7, while Nash hit 1.6 Stock hit only 0.6) and steals (Stockton had 3 times as many steals per 36).
But at the end to me there is no way Nash is even close.