According to accomp.me, gloves / boots / helmets are spread out between O2S and O3S. O1S has the widest spread of drops (23), while the next two instances each have 14 different potential drops aside of their guaranteed extras.


O1S – Accessories, Waist, Datalog 1.0
O2S – Feet (Aiming, Casting, Fending, Healing, Striking, Maiming), Hands (Aiming, Casting, Healing, Maiming, Scouting), Head (Fending, Scouting, Striking), Glaze, Early Model Tomestone, Datalog 2.0
O3S – Feet (Scouting), Hands (Fending, Striking), Head (Aiming, Casting, Healing, Maiming), Legs, Twine, Roborant, Datalog 3.0
O4S – Body, Shield, Weapon, Datalog 4.0, Alte Roite mount