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.

Rotation for Arms Warrior Wotlk

Arms Warrior Rotation and Priorities

Overpower [Procs] > Rend (Keep on target) > Mortal Strike > Bladestorm > Execute [Sudden Death] > Heroic Strike when above 60 rage > Slam

Tips

Recklessness increases the damage taken, so this cooldown popped at the wrong moment can mean instant death, know the fights well.

Slam may reset the swing timer, so a badly timed slam will remove a weapon swing and turn to be a rage and damage loss, and therefore a DPS loss, many of these throughout the fight will weight very badly on the overall DPS.

Cast special abilities between swings in order not to lose the auto attack.