Tier S - Must have

Charm of the Hedge Wizard (20% healing share)
Rack of Masterbrew Vials (potion share)
Pouch of Relaxing Herbs (-90% globadier dmg)

Tier A - Consistently Useful

Night Prowler's Cylindrical Box (12% to double consumables)
Lichebone Pendant (-50% Grim health loss)
Stone of Pure Luck (+100% luck)

Tier B - Worth considering

Rainbow Fish (20% to not consume healing items)
Seal of the Swift Strider (+6% movement speed)
Bale Taurus Head Ornament (+50% downed hp)
Bone Saw of the Medicus (50% revive speed)

Tier C - Niche

Gunnery School Guide, Expert (+60% grenade radius)
Arcane Lustrian Flask (6% chance to apply poison)
Valiant Emblem of the Phoenix (50% respawn speed)
Assassin's Skull (-60% assassin dmg)
Silver Dove of Shallya (if you medic kit ally, you are healed for 20% of your missing hp)

Tier D - Trash

Badge of Warding (-60% gunner dmg)
Spine Rune Fetish (-60% packmaster dmg)
Master Engineer's Tools (25% chance to save grenade)
Bottle of Bordeleaux Wine (25% to not consume potions)
Sturdy Emblem of Shallya (medic kits cant be interrupted)
Ghal-Maraz Pendant (revives cant be interrupted)