painting with a 2-3 brush

I love to paint by using 2 to 3 brushes at once, let's say the first brush is cyan,second brush magenta, and third brush yellow, I do not use black color now. to get the dark color of course adjusted to the lighting and color content of the shadowed object.
and someday I'll use my hands to paint, so there are 6 brushes at once. hmmmm ........ increasingly difficult just to paint. can never be if we have not tried, but try something that looks difficult becomes easy, let someone else say "where possible", do it and shut their mouths with success