My experience of Pirelli N0 on track was that once you pushed them they did not hold up well. You need to be a very smooth driver on track with them.
Ultimately you might want to consider moving to Michelin 4S tyres, subject always to warranty considerations.
But to answer your question and based on OEM 33 psi front and rear, on track I would start with 3psi less, easy first lap, second 75%, a couple of quick laps and in lap at 75%. Check pressures and also tread temps with pyrometer.
If temps are within 6c across the tread and temps are up to 33, you are probably OK.
If temps are widely different across each tyre, you need to look to driving style or speed exceeding tyre / camber capability.
If temps OK and pressure up just a couple of psi, let another our couple of psi and then leave at those pressures.
If you have take out more than 5psi, I’d take easier on track with these tyres.
If you are getting tyres squealing on corners, you have too much slip for those tyres, which are road biased after all, and are pushing them too hard.
All of the above is subject to your feel for the grip and confidence in what the car is doing on track.
Hope that helps.
