I prefer to use Copic and Blick Studio markers in my work, as I found they have the most vibrance as well as longevity. They are also easier to blend and create more nuance between colors, in my opinion. Many of my marker works also have colored pencil highlights as well as a little acrylic paint to add shine and substance. Each individual work could take upwards of several weeks, depending on the complexity of the image, but some take as little as a few days.