Of course
Im sure that maintaining altitude with 2.5 or 3 degrees and about 85% N1 will give you about .76 at most of the typical flight levels and weights in cruise.
But they should include a pitch and thrust for cruise in the memory items.
And the level off critical question remains?
"Am I levelling off or is something in the air data system fooling me and leading me to disaster?"
I wonder if there is any means (other than GPS) to rule out a problem in altitude indication before leveling off for the trouble shooting