The Abyssal Blade is also broken in this respect......
I did some testing and as far as I can tell I would get an interesting sparkle around my target VERY rarely.. (1 in 50 hits) which I assume must be either Hit Mana Drain or Hit Fatigue (can't tell which). As far as being able to Measure the actual amount that is Drained or Fatigued I couldn't. I only had maybe 100 swings to test it but the Gargoyle character was my Crafter so I wasn't doing enough Dmg to make the Drain / Fatigue amount easily figured out. Also... I'm kinda guessing on this but it appears to me that If Multiple leeches (Stam / Mana) go off on a given hit then DRAIN / FATIGUE do not.. Ah well I will have to test it some more.