As the tooltip implies, it does not?
Increases the critical strike damage bonus of your abilities in Battle, Defensive, and Berserker stance by 20%.
Blizzard tool tips aren’t the best bro. I imagine that yes it does cos. But if it doesn’t what a hilarious mistake. But you can bet the fight club discord would have picked that up in about 5 seconds.
And if you’re not sure test it on PTR man.