APA has a great book that delineates what each school ranks most important in the context of GPA, letters of rec, etc. Personally, my statistical and computer skills far exceed my GRE quant score, and I have more years of teaching experience than I have research experience. So I hedged my bets, applying to schools that valued my strengths, not necessarily the "Top 5 I/O schools," because that wouldn't be my smartest strategy; does that kinda make sense? I also made spreadsheets upon spreadsheets of POIs, average GRE scores, etc.
Also, my most helpful tip I think is to take ALL of your options into consideration. I literally researched every single program on the SIOP website. Every school deserved a fair shot in my opinion, because all I really have to go on are the [often outdated] websites. I went from a shortlist of 53 to a final list of 8 Ph.D. I/O programs, 1 Ph.D. Management program, and 2 M.S. I/O programs. I've hardly gotten decisions back yet, and this might be overkill for someone with perfect scores and insider info, but I hope this is helpful nonetheless