class rank and letters will be more important for you then.
most letters make a statement about where the applicant fits within the writer’s experience of other applicants. If they state that you are ‘one of the best candidates in this year’s match’, that carries a lot more weight than a letter which only states, ‘strong/solid candidate.’
also, if you’re aoa, or at least in top quartile, you’ll probably still get a reasonable number of interviews.
all that said, we had one resident who matched several years ago with poor board scores and so-so grades from a so-so medical school during a particularly bad year. he matced largely because one attending really liked him during his externship. no surprise, he’s made a ho-hum resident (and that’s generous). But--guess what--he will still graduate.
(scary admission, but true).