Thanks anon. Here's a pic of tools from top to bottom.>Pentel arts color brush pen>Sakura Permapaque marker>Pentel pocket brush pen>Pilot Kakuno fountain pen>White out correction pen
A lot of the work is done mostly with the pentel brush pen where it can create a variety of lines, as well as unique strokes when pressed on it's side.
The grey brush pen is obviously great for creating another set of values.
The sakura marker mostly covers larger areas so as to not waste the brush pen ink.
Kakuno is a backup incase I forgot my brush pen. Works nicely for fast gestures too.
And the white-out pen is for general mistakes.