Track Day Brake Pad Life query

Hi All,
I have recently got myself a Renault Megane 3RS 250 Cup track car. Its got KW Clubsport coilovers and I've been running Nankang AR1 tyres.

I recently changes the brakes discs and pads, Fronts to High carbon plain discs and Ferodo DS3000 pads.
I've just finished my 4th Track day with these pads and they are fully finished, almost down to metal on both fronts.
How long should I expect a front set of pads to last? Same with discs, I'm gauging the discs will last around 4-5 sets of pads?

I have been having a read of recommended pads for track running and I've got a set of Endless ME22 pads to try. Winmax W5 after these. I only use the car as a track car so only driving to the track on them also. Is 4 days about right? Thinking of getting some cooling sorted as they're working pretty hard and I hope this would increase their life.
Any other recommendation's for increasing longevity?