Recently, I asked Blizzard if we will get some arcane mage to HotS soon. They responded to me that Medivh is arcane mage lore-wise and Whitemane is what resembles arcane mage(although she is healer) gameplay-wise.
Then I looked at Whitemane and her chapeau and her tabard. It reminded me of nightborne clothing. Also, her prideful pose also resembles nightborne standing animation. On top of that, her Inquisition looks pretty much like yellow arcane missiles.
I thought that giving Whitemane longer ears and some fancy arcane armaments would make a proper skin then.
https://www.artstation.com/artwork/BmzEyk
Enjoy.
Also, please join HotS community skin vote. The most popular has chance of getting to the game.