Spoiler: The level 20 leather working crafting item is Gloves of the Covert Brigand. A tip for rapid leveling: Buy stacks of leather, residuum and crystals from auction house. Craft rare leather armors multiple times whenever they come up on your rare list. Purple assets helps to make gemmed armor.
With that lifedrinker enchantment, you could maybe gain life faster than you take damage. I'm almost at 60. I'll have to try it out with sly flourish. It should only take 7 to 10 secs to deal out 23 attacks for 100% health gain.