I'd be inclined to credit low sample size more than the weapon skill choice. As I said, there were only like 40 of them or something. I generally considered proccing with Energy Drain to be a waste of time and TP so I didn't do it often. My Aeolian Edge results were almost very difficult to analyze in any automated way because I'd proc monsters and then they'd still get hit with future AEs, so I had to limit my analysis to Energy Drain.