Reduce the culling's cooldown
You nerfed it's range, meaning it's not as good as poking people out of lane anymore (which was the broken thing about it) Now you can reduce it's cooldown. Since it'll be used more as a kiting tool (which i believe was the original intend of it) and as a finisher more effectively.
At the moment, there's no reason for it to have a such a long cooldown.