If you get all those breeds, you should get at least 15 eggs a week during the summer, maybe not when theyre molting, but that is enough birds to get 2 doz a week!
On most days a black Australorp will lay everyday. However the bearded d'uccle will lay smaller eggs. Also the easter eggers, buff Orpington,will lay everyday! With the silkies you can expect around 4-7 eggs week.