I've got to ask, is this passive basically useless for staff sorcs? From what I can gather, it only works with weapon kills. Hard enough for a sorc to do, especially one with my particular stormcalling/summoning build, but I took the time yesterday to kill over 100 humanoid VR1 and 2 mobs with JUST my staff, and had absolutely no Grand Soul Gems filled in that entire time. Is it bugged? Or does staff kills just not actually work for this passive?
The whole description makes it sound like I should be beating the mobs to death with the blunt force of my staff, other than the projectiles it shoots out of it, so I don't know.
Any help with this question would be appreciated.