I did some tyre tests years ago, riding round my local velodrome with a variety of tyres and at different pressures. Fastest was kojaks, with 60psi the optimum pressure. That was a smooth tarmac track so on real roads a lower pressure may be better due to better bump absorption counteracting the higher rolling resistance.

I have since improved efficiency, comfort and rolling resistance considerably buy running them tubeless.

For the tubeless conversion I got 20" stans rims trips with stans sealant.

Tubeless takes away a lot of rolling resistance and also reduces flats. When you puncture the tyre the hole doesn't expand like a hole in a tube, the latex plugs the gap, you lose some air but you pump some more in and carry on riding. No need to repair further later.

Kojaks are ace. They don't last that long but the performance is worth it.

If you want a really puncture resistant tyre, second place in my tyre test was schwalbe marathon racer.