Specialty armour pieces are typically tools used for their passive effects and aside from the slayer helmet, are rarely the best in-slot item. Most of these items are rewards from quests, skills or achievement diaries.
Specialty Armour and their Uses
How to Get
Full Slayer Helmet
Increases DPS towards active Slayer Tasks.
“Smoking Kills” Quest + Slayer Reward Points.
Ancient Ceremonial Mask
Negates the requirement for a Zaros kill count in the God Wars Dungeons.
Quick access to Nex and AoD.
(or buy off the G.E).
Morytania Legs 4
Increases XP gained from Slayer Tasks within the Slayer Tower.
Slayer Tasks in the Slayer Tower.
Morytania elite tasks.
Desert Amulet 4
Increases Keris's accuracy.
Desert elite tasks