Just finished my piece and turned it in, phew! I wrote about Elementalist Lux, which is to this day one of my favorite skins. It transforms Lux into a powerful Queen and mage, fighting a losing war against gigantic monsters. It's a skin both beautiful in game and rich with narrative potential, and I took it from an angle where Lux had discovered the first inklings of her power in her youth and then jumps into her furious struggle against the beasts that destroyed her Kingdom.
Edit: Whoops, forgot to post the whole piece... It's attached!