I tend to do a black coat primer, undercoat without destroying much of the shadows with bleached bone (I use a very thin coat, maybe apply two-three times), then one or two coats of sunburt yellow. Highlight tends to be a sunburst yellow/white mixture (I tend to use a ratio of 4 to 5 / 1).
For guardians, sometimes I do destroy the shadows, so I'll wash carefully with a brown (beastial brown works well) or flesh wash, watered down (once in a while I'll try chestnut, but my preference is flesh).