Oh God, TMI.
Believe "Flying the Big Jets" suggested correctly that knowing the power setting for the next phase of flight was a required point of Airmanship.
On any 75 with an ASI, set the power and then check the numerical "Barrels" on the ASI. Are they turning? Increasing? Decreasing? Then you know what to do. When they stay put, you have it nailed. Everything else is just Nice to Know.