Excellent stuff!
The skin on the two trolls in particular are extremely well done!
Are you using glazes to add different tones in there?
For the larger models like the troll I start with wet blending the shade, midtone and highlight colour straight onto the model and then use glazes to refine the blends and push the contrast. For small models it's mostly glazes. I like using the army painter washes for glazing either on their own or mixed with paint.
Are you a wizard?
Ha, no. But I have had a lot of practice and I do this for a living. In a good week I can paint up to sixty hours.