'Tones,. .Take it from an old stager--- whatever you put in, you must know what descent profile you want to fly, and make the aeroplane do it.
Don't become mesmerized by the FMC's, they are just another dumb adding machine, sometimes very dumb.
All the beaut gear is still just an aid to operation, make certain you are flying the aeroplane, and not the aeroplane flying you.
Tootle pip!!