I gave up few month ago. SL isn't a very popular expansion. I mean blizzard litreally giving it out for free right now just to get some players. So it isn't really freakz fault. I am just waiting for ...
And what makes you believe it should increase damage in vanish? When in data base clearly says Shadowdance or Stealth only?
https://www.wow-freakz.com/spells.php?spell=14062&name=nightstalker
[quote ascuns] If you have better proof that it shouldn't work like that please be my guest and provide it. Just know one thing. This bug was known and confirmed in 7.2.5 before. So you will be just wasting your time. So go ahead learn a proper shaman rotation or pick another ...