Arms warrior is a utility spec, it brings [Trauma], increasing bleed damage by 30% and [Blood frenzy] increasing physical damage done by all targets by 4%. The overall damage it can increase will depend on the composition of the raid, however, for 10 man the raw difference between Fury and Arms will make arms lacking. The DPS difference between Fury and Arms are considerable, because of that it is seen mostly has a PVP spec.

Gems and Enchants for Arms Warrior Wotlk

Arms Warrior Enchants

Head

[Arcanum of Torment] – Knights of the Ebon Blade

Shoulders

[Greater Inscription of the Axe] – The Sons of Hodir

Cloak

[Enchant Cloak – Major Agility] – Enchanting

Chest

[Enchant Chest – Powerful Stats] – Enchanting

Wrists

[Enchant Bracers – Greater Assault] – Enchanting

Weapons

[Enchant Weapon – Berserking] – Enchanting

Hands

[Enchant Gloves – Crusher] – Enchanting

Waist

[Eternal Belt Buckle] – Blacksmithing

Legs

[Icescale Leg Armor] – Leatherworking

Feet

[Enchant Boots – Greater Assault] – Enchanting

Arms Warrior Gems

Meta Gem

[Relentless Earthsiege Diamond] +21 Agility and 3% Increased Critical Damage

Requires 1 red, 1 blue, and 1 yellow gem

Red If bellow 400 armor pen

[Bold cardinal ruby] +20 Strength

Red If near or above 400 armor pen until 1400 armor pen

[Fractured cardinal ruby] +20 Armor Penetration Rating

Stats/Blue

[Nightmare tear] +10 All Stats

Yellow

[Puissant Dreadstone] +10 Armor Penetration and +15 Stamina

Notes

Gems and enchants should be picked depending on the stats needed. Example: If under hit cap gem and enchant until hit cap, following the stat priority.