Now this is what I do in NBA2k8 in my Franchise mode...... I know its just a game but I think it could work in real life.

I start off the game giving them both a few chances to score down low based on the flow of the offense, I try to get them both a few opportunities.. And basically by the 7/6 minute mark of the 1st quarter... I replace whoever has been less effective thus far with David Lee.

Then the rest of the game I rarely use them on the court at the same time (except begining of the 2nd half where i do the same thing)...

Lets say Zach has it goin in the first... I slide him to Center.. bring in Lee... and Zach is my main post option

When Zach gets tired i replace him with a rested Curry

Basically the entire game you have at least one dominant post threat on the floor which makes things very tough for the Defense especially if they both are having good games.

The only thing you might say is that Zach can't play center but thats just bull**** maybe he will get hurt by Shaq/Yao but most of the league i see no problems at all with Zach at the 5.

Zach is pretty strong and should be able to hold position in the low post against most centers. With Yao, Shaq and anyone else like that, we just have to either have Curry in the game or go with Big Snacks.