Claw of Lightning is disappointing (ranger)

[PatChapp]

It has the same backstab damage,but is much slower.
Usually the vulak dagger is considered the best at 15/19. True tryhards will swap in the ragebringer(if they aren't offhanding it) for the +atk on backstabs.
I understand their is circumstances where the vyemm fang can be superior to the vulak dagger