I think if you are looking at a clutch of hatchlings you will have an easier opportunity to ID them by comparison.
Spider may be obscured in a combo (Cinnamon/Mojave, Lesser/Mojave), but the wobble will remain.
Het Clown will likely have minimal impact.
Cinnamon functions similarly to Black Pastel. My Black Pastel/Spider/Lesser looks just like a brighter Black Pastel/Spider. If I hadn't used a Super Lesser to make it: I wouldn't even know it had Lesser...I think a lot of people will struggle to ID certain combos...