The Slayer helmet needs a bit more love with the expansion to 120 Slayer on top of a new combat style.
Maybe a way to give it some help would be to add in a new item that combines a moonstone with a salve stone, and then ensoul the helmet to Tier 85, and granting a necromancy bonus.
Also, it could work as a universal helmet (on task only) to work with the set effect for armor sets (if they have 2 or more pieces equipped already) so we could retain the benefits of sets like Deathwarden or Havoc.
What else could be attached to the slayer helm other than possibly the reaper gem?