I'm very keen not to be a "test pilot".
How do you know all your cylinders are running at 25ROP EGT or at peak EGT?
What are you going to do when you find out, after you've studiously set the mixture to "peak EGT", that in fact 2 cylinders are running 5 degrees ROP EGT, 2 cylinders are running at peak EGT and 2 cylinders are running 4 degrees LOP EGT?
Do you become a test pilot simply because blissful ignorance has been replaced with knowledge of what's actually happening?