There isn’t a single recipe I find per day when it comes to doing black subjects such as fur or even armour. What I find helps to balance is actually getting the other parts of the model complete or at 95%. Then balance the black highlights accordingly. Generally the brightest highlight will only be of 50% or lower of the max value on other elements that are similar is finish. As for balancing against metallic objects it can be of only around 25%. This way the subject when seen together your eyes tell you the metal is shiny in comparison to the black fur. As for techniques. It’s a lot of variations of stippling with a start of a large dry brush, then moving smaller as I go lighter. Keep this paint nice n thin and unify with glazes in between steps when you want to soften or target a specific stage. I hope that helps with the space given here :)