hi,
you should look for t.words in segmental jumps of 20 pages. do 40 pages if the novel is really big. you should have about 25 words for a novel.
but frankly, if you pull out trigger words and do super reading and dipping it's a sure way to ruining your ending

so it depends on your purpose, if it's for school do all the steps (i think if it's for school you dont even need rapid reading). if you want to enjoy it just do prepare, a slight preview to know the atmosphere and the characters in a general not ruining way. pr and go straight for rapid reading. sure it takes more time but, it's more enjoyable and you will benefit from the steps before rapid reading.
hope this helps
Raanan Hadar