For light skintones, I'd recommend Apricot, Ivory/Blush, Almond/sandstone/tan when shading skins. Of course, you can use other colours as well, but these are the ones I prefer. Ivory gets a little yellow when you scan it, and can sometimes clash with blush.
But it's easy to test before.
(For Sam, the greenhaired one, I used Ivory, Saffron and blue pearl so there's like multiple ways to use them!)