Needless to say, Friday the 13th: Part V - A New Beginning is probably one of my three favorite Friday the 13th films. And realistically, as a saga Parts 1-5 can't be topped by any other slasher franchise that spanned more than a few sequels.
Even with the A Nightmare on Elm Street franchise, the movies shit the bed by Part IV. Then we have the franchises like Children of the Corn, Hellraiser, Leprechaun, Halloween, Texas Chainsaw Massacre, etc, that became pure garbage after 2 or 3 sequels.