My new weapon of choice;
Copic WIDE -extra broad- markers
They look like sharp chisels. The large tip allows for the broadest range of line width which I have ever achieved with a marker. I really enjoy throwing down huge shadow areas then, without switching tools, delicately adding wispy lines.
one-minute poses (one color) 24 x 18
one-minute poses (two colors) 18 x 24
It is a great site filled with video tutorials
in all areas of drawing and painting.
I highly recommend checking it out.
It has useful information for all skill levels.
One last note: the middle value would dry up quickly while I was drawing. I found that misting the tip and inside the cap between uses helped refresh the ink flow.