I concur with "Desperation". I use 8 oz. (by weight) of WM Mozz. as for sauce, I haven't measured yet mainly because I 1) haven't worked out a consistent sauce that is the same weight / volume yet and 2) I just freakin' forget everytime to try measuring it. But I would guess I am using closer to 6 oz.
I would say start with 4 oz. and if it seems a bit dry for your taste, bump it 2 oz. at a time until you hit the spot :-) Enjoy! Happy Pizza!