RPE system explained

https://www.elitefts.com/education/training/rate-of-perceived-exertion-rpe/

Check out the above link for an article by Mike Tuchscherer on Rate of Perceived Exertion (RPE) System, being adpoted more & more in powerlifting with great success, maybe it's something that could benefit yourself, nut first make sure you read up on it before you decide it's something you want to try out.

https://www.elitefts.com/education/training/rate-of-perceived-exertion-rpe/