[@Ciaran]

Alright looks go to me balance and lore wise. For an artifact, I suggest an ether gauntlet that she can wear. The gauntlet is of a gilded ornament design, and at her own will she can use her stored ether to fuel it for a maximum carry limit of 2 tons. A full charge can last for 30 minute for that strength, or it can be released all at once for a concussive blast of blue energy. A full charge of the gauntlet however requires 1/4th's of her augmented body's reserve.

Edit: Her job will be a mercenary. Aside from utilizing her stealth her array of equipment may give her different tasks rather then being a pure assassin.