Quote Originally Posted by cdr View Post
This is the mobs lacking death animations AFAIK, which I'm pretty sure is a known issue. If something instakills them, like Wail or Smiting or whatever, some types just disappear.
This - a LOT of people are using smiters in the new content, so anytime you're seeing a mob disappear with part of their health bar remaining, it most likely got smited. Smote. Whatever.