Orson Scott Card, the great sci-fi author, was the man who introduced me to the importance of "wise readers". These individuals whom an author entrusts his manuscript to in order that they might catch something he did not.
Every author must have wise readers.
When selecting wise readers, it's good to have diversity. Spanning age, gender, and reading interests is helpful. A story that can appeal to a broader audience is going to have a much better chance at being published, and if it is published, will then have a better chance of selling well.
The wise readers you choose must be the types of people who can tell you flat out when something is not working. They must be ruthless in there (should be "their") desire to make your book the best it can be, and thus they read it with a scrutinous eye, combing for fallacies, plot holes, bad dialogue, false emotions, triteness and the like.
The warrior's (should be "warriors") in this comic are similar to the type of wise readers you are looking for. Fighters who will battle to make your story shine.
Now a quick shout out to my wise readers:
Amanda Barr! (Elite destroyer of misspellings)
Jacob Gomez! (Bearer of the youthful eye)
Doug Barr! (Wielder of the axe of error-corrections)
Jonathan Synnott! (Sage of literature, and bringer of truth)
Gary Redinger! (Stalwart of the books)
Going with the fantasy motif: May your wise readers speaketh (should be "speak") truth, and may you hideth not from it...