I am trying to paint up the contents of the WarCry: Bloodhunt box in an easy to replicate and fast-ish scheme.  If I buy other expansions with unique features I will update as I progress though. Currently, the weather is wet and cold and I haven't had a chance to get a deep brown primer.  I will post pictures as soon as possible.
As it sits this is a recipe, but as I add pictures I might add more in-depth and turn it into a full blown tutorial with better explanations and tips.
Prime everything in a dark brown similar to   Dryad Bark  
Using a large makeup brush, drybrush the entire tree   Gorthor Brown  from roots to tips of branches
Using a large makeup brush drybrush the trunk and limbs of tree   Baneblade Brown  and fade into roots/lower portion of tree
Using a large makeup brush drybrush the limbs of the tree   Karak Stone  and fade into trunk
Edge highlight/drybrush with   Wraithbone  
Basecoat all bone with   Castellan Green  
Using a fluffy makeup brush, drybrush the bone with   Zandri Dust  
Using a fluffy makeup brush, drybrush the bone with   Ushabti Bone  
Basecoat all Stone with   Castellan Green  
Using a fluffy makeup brush, drybrush the stone with   Celestra Grey  
Heavy wash with   Athonian Camoshade  
Using a fluffy makeup brush, drybrush the stone with   Ulthuan Grey 
  Hobby enthusiast. Husky owner. Salty old man.