Shadow Impale just received a couple of buffs via a hotfix Friday evening. The hotfix buffed the Shadow 6p from 40k to 50k and changed the Impale bonus on Karlei's Points from 60%-80% to 375%-500%. As of now, these changes are not reflected in the text on the Shadow set or Karlei's Points, but they are live on the PTR. The text will be corrected at a later date.
The buffs to Impale are just what it needed, as it places Impale near the top builds currently on the PTR. It will be so nice to have another viable option to push solo DH in Season 12. Thank you Blizzard, Thank you Don Vu, Job well done !!!