I guess the solo from 'Achilles Last Stand' is in the same tradition as the solo from 'Stairway to Heaven'. . . it is on that level to me.
There are so many different kinds of writing and so many ways to work that the only rule is this: do what works. Almost everything has been tried and found to succeed for somebody. The methods, even the ideas of successful writers contradict each other in a most heartening way, and the only element I find common to all successful writers is persistence-an overwhelming determination to succeed.