Why would you want Steal to steal an item? If I were to design THF as a job, I would have Steal work like a debuff, such as having Steal - Arms would lower the damage dealt by target while increasing your damage, Steal - Armor would increase damage taken by target while increasing your defense, and then have Mug do damage while grant a temporary buff which would then combo into Throw or Hide, which does either massive damage or enmity drop respectively. 5 actions right there, perfect for all the job quests needed.