I really like the griffon´s wings, they are well painted, but I think you should have given the body more highlighting (the way you did the claws), that would harmonize it more with the "dry" look of the wings and the elf. Some inking on the elf´s armour would give it some more depth (the same would work on the white griffon´s head).
Otherwise, it´s a nice mini which is surely great for gaming.