All but the clover will benefit by lightly disking it in. The clover does not need it, and if you do, some seeds will seat too deep to germinate, but I'd take the cahnce, espcially if its been dry in your area. After disking, I'd cultipack it, or drag the weighted plywood over it again, to reduce the air pockets in the soil. This will help the clover more than the other seeds.