The first thing I learned when I began my formal art education was to plan ahead. The last thing you want to do is get elbow(finger?)-deep in a piece and realize something's off with the anatomy, design, or composition. Here are some of the many concept sketches I came up with while brainstorming:
I ended up going with the pose in the upper left corner of the last page shown. Up next after the break: How to forge a Mystic using a pen and paintbrush.