I need a good yellow cake recipe for a wedding cake. I like the WASC? Can I use yellow cake mix instead? Any other good yellow cake recipes.

The WASC cake can be made using any complementary flavor of cake mix and extracts.

Everything you need to know to make tiered, stacked or layer cakes:

http://www.cakecentral.com/cake-decorating-ftopict-605188-.html

Above has Rebecca Sutterby's and kakeladi's versions of WASC and flavor variatons... (kakeladi's uses no oil or fat.)

HTH

Here's a basic yellow cake recipe made from scratch. It makes one layer, so you can multiply it by how many layers you'll need.
http://www.delightful-cake-recipes.com/yellow-cake-recipe.html