Game Mechanics Audio Feedback for Backstab's double damage

I think it would be nice if there was a more satisfying sound effect that played when you land Backstab on a mob's back, giving it that extra feeling of oomph.
As for the sound, my personal choice would be "item.mace.smash_ground" at pitch 2 because it fits with the sound of Backstab, but what do you guys think?

 

THIS. I swear to god, the current backstab audio is so unsatisfying and quiet. it gets muffled with other sounds and you never really know if shadow siphon's triggering in solo boss fights. I've died an embarrassingly large amount of times thinking shadow siphon reset my vanish cooldown.