Ranger with Greatsword->Sigil of Superior Leeching
Another ranger bug? Sigh. Just add it to the eternally long list and pray it gets fixed one day.
This is pretty obvious with opening strike or with an “invincible” enemy. Swoop for whatever reason does a bunch of attacks as you run that will drop any on hit effects. Use swoop close up to the dodge roll trainers (after they finish rolling) and watch the red popups
What about Crippling Throw, i think this is a bug.