Question - How do you flightplan extended spousal cross-country flights?

[B2C2]

Its a turbo, so no change in settings up to 24k ft. MP and fuel flows are constant with altitude. Plane gets faster at higher altitude due to constant power. I have a chart of LOP power that I pulled that number from. I can re-check it but power is directly a function of fuel flow when LOP. all fuel is burned. I always cruise LOP. At current fuel prices its pretty easy to justify the GAMIs. I burn probably 5-6gph less flying LOP. My aircraft came with a JPI 760 and I set fuel flow LOP based on TIT which I hold under 1600F. CHTs are cooler than ROP