I like the distinction of "Original to Infinite" because so often when I see these lists, it's dominated with the same few classic helmets and the Infinite originals get left out to dry.
imo, 5. cambion w/ fci-bane attachment (i love cambion its just the skull face that ruins it for me, and this attachment makes it look 100% better) 4. morrigan (its just such a damn good helmet from concept art, and im glad that they brought it to infinite and lucky enough to snatch it for free before it went away) 3. war master (again, i hate the skull-like visors, but its not as bad as cambion, and i do like the promethean-esque feel to it) 2. locus (im a sucker for helmets with no visors and this is just a perfect execution) 1. anubis (i like the new angular glow up, i loved it in halo 5 but infinite's is just so much better)