Unfortunately can’t help you more than what I’ve experienced.
Quest 2017 - TKC 80’s combined with OEM tubes, varying pressures. Lots of punctures. Myself and Scrat had two rear wheel punctures, non related to pinches. We rode the whole event on 2.0 bar.
Quest 2018 - Karoo 3’s with heavy duty tubes. Way, way less punctures and the majority caused by a batch of factory defect tubes. They were replaced afterwards. I rode on 2.0 bar and suffered two pinch flats front, but could feel both due to incorrect lines chosen.
On my 2017 Quest bike suffered numerous punctures up to changing the OEM tubes to heavy duty and upping the cold pressure to 2.1 bar.
Let me know if you find a solution that works for you.

Sent from my iPhone using Tapatalk