Repeat the question; I'm not following. Are you saying you want to breed a Blue Mottled bird to a Lavender bird? And a Black Spangled bird to a Lavender bird?
If you don't want a lot of roosters then don't breed or only work with one variety.
Short answer, no. Silver-laced should only be bred to Silver-laced or you'll lose the pattern. Some of us are working with Silver-laced Lavender, Blue, Chocolate, etc, but that's after multiple generations of...