Fallout 4: 5 Most Useful Perks (& 5 That Are Useless) 9 Useful: Hacker. ... 8 Useless: Bloody Mess. ... 7 Useful: Mysterious Stranger. ... 6 Useless: Lead Belly. ... 5 Useful: Mister Sandman. ... 4 Useless: Scrapper. ... 3 Useful: Know You Enemy. ... 2 Useless: Shield Harmonics. More items... Jul 28, 2020