I always run max pressure or 5 under. I can't stand squash tires and I'm over 200lbs so if my tire says 40-65psi I ride at 60-65 otherwise I feel like the wheel is hitting the ground and the ride feels unstable. I've never found signs of a pinch flat its 90% punctured from screws, glass, small Sharp plastic bits, etc and 10% wheel liner failed and spoke/nipple pokes a hole in the tube.
Think maybe this time ill try liners and see if it helps. I've tried the foam tubes when I was young and they only work if the tire fits them perfect and you don't weigh too much but they are heavy too.