A really great concept indeed. The robe is my second favorite robe in the game, so beautiful.
For my taste a bit too little AC however. If you consider using mods, what about a Transmog mod? My electro-Cleric/Sorceress is usually wearing the Nymph robe (from Basket Full of Equipment SFW mod). I don't think wearing heavy/medium metal armor is ok for a Sorceress, so I use light armor and transferred the look of the Nymph robe to it. I get 14 AC and, very important for Honour mode, +1 Initiative while still looking good.