I know this isnt that helpful, but on the subject of gear, i think a large part of your actual dueling gear needs to consist of massive amounts of ias to compensate for the lack of ias on a widow, and a sorc's inherent Mega-Slow attack speed. I think physical dmg is basically useless on this build,so maybe like a 60/60 armor, and a 45/45 lifer helm? Then just like all + fire skills items for prebuff. Hope i helped a little.