Im gonna say something controversial
Delete Rageblade
from the game.
I can say that this item is basically a balancing nightmare at this point in the game with all kinds of new builds and kinds of champions that can do on hit damage/stacking on hit abilities.
I can say more but i believe that the most broken abuser that can come to mind is
(shes basically perma-banned in higher elo because of the set build. Kinda Ironic because like father like daughter.)because she can get all 3 evolution if you get 2 other items(
&
) and attack speed boots.
The biggest thing that she abuses is her passive stacking can become even faster because of Rageblade's effect to make double hit on it.
Kai'sa is one of my best examples and i could make more but I need to get more details towards some of them.
(small off chance she does but i dont know)

I know the item is Niche but its not as healthy for the game in the long term because it limits new champion designs in using new abilities and passives that are On-hit style of play.
but thats just me. I dont know if you guys think the same way as I do with RageBlade.