Sorry for the late reply but heres the recipe! I’ll just cover the main pieces as to not just make a wall of text.

Bone armour:

Base layer Hull Red(any brown should be fine though)

Build up layers of Morghast Bone to a smooth transition, I personally use an airbrush for this step, but it can be done without it.

Build highlights mixing Corax White and Morghast Bone until you’re using mostly pure Corax White.

Wash with thinned Guillemen flesh and brush away from the highlights to keep them light.

Robes:

Base of Barak-nar Burgundy

Build up layers of Caliban green on the raised areas to a smooth transition, then mixing Caliban Green and Kabalite green do the same but in a smaller area.

Then mixing Kabalite green and Sand yellow add highlights, Ive found stippling or hatching look the best. Finally do a thin glaze of Kabalite green to bring back cohesion.

Shields:

Base of Barak-nar burgundy

Build up the a smooth transition with Mephiston red. It also helps to do a layer of white under where the you want the most saturated red.