One of the factors that weighed in on best walkout song choices was more than just the song itself. It wasn't going to be a "We like these five songs" list, and instead is about successful fighters that choose good songs that served them well. RDA used to walk out to other songs, but he changed everything up when he moved to WW, including his song. Jared "Flash" Gordon uses a song representing his namesake. Last Breath admittedly is not a good song personally, but more fighters chose that song than any other so it can't be ignored. Who can be mad at the Mortal Kombat theme? And I'm Shipping Up to Boston (and the Dropkick Murphys altogether) went undefeated this year, so it was worth mentioning, especially since the UFC didn't go to Boston in 2017.
Diakiese walked out to "Man's Not Hot" once, "Cool Nuh" by Giggs ft. Wrench 32 once, and "Shut Up" by Stormzy once this year. Hard to pick one of the three songs one fighter used this year, and to add to that, he lost after walking out to it. Of those three, I'd have picked "Shut Up" but none of them were worth mentioning above the hundreds of others to pick from.