In my turbocharged commander 114tc (se) max take off power is 39/2575.
Once airborne over 1000ft agl I will go to high climb power 35/25 .. Later I will go to normal climb power 30-31/24
Cruise is 29-31/22-24.
Square on a turbocharged piston in this category? I think not.. Only at approach speed. 23/23 gives 120kts.
I allways reduce throttle first. The reason is that when you reduce rpm the mp will always rise a bit. You do not want to do that when you are already at max.
The other thing is that its the easy way to work the flow from left to right .. First throttle, then rpm, then the fuelmix