If its not too late, may I offer my suggestion for AngelBlade Riven?
Try to take any cloth you are using in her outfit and give it the same look and feel as the cloth on Angelic Overseer from Magic the Gathering.
http://www.artofmtg.com/wp-content/uploads/2014/06/Angelic-Overseer-MtG-Art.jpg
Its absolutely gorgeous, imo, and would look awesome on an angelic themed skin.