Wedding Cake : Arbor Discussion

Amaretto Cake. Buttercream frosting. We like the art deco style (can this be achieved in buttercream?), not a fan of fondant. These styles should be envisioned in our wedding colors - Silver, White, Black, Plum 1. Top Choice, Art Deco/Great Gatsby Geometric, Initials incorporated into the cake design (so we don't need a topper). bonus points if you can get roman numerals X and V on their as well. 2. Geometric Ribbons over plain color OR Pearls 3. Ombre color.