My website recently has increased significantly amount of page views (x5 daily, and non-stop since May), however, the unique pageviews metric didn’t increase. It causes our time on page metric drop up to 80%.
The source of this increasing view comes from organic traffic (as checking on GA).
I believe you are referring to Super Bot Fight Mode right?
I don’t think you can get much benefit (especially on bot mitigation) from the Business Plan. There’s a product called Bot Management (different from Super Bot Fight Mode) which offers advanced analysis of bot scoring, but this is only available on Enterprise plan.
Anyway, you can try to tune your Firewall rules to JS challenge some known hosting providers such as OVH and AWS, since most probably they are the source of bot traffic.