Barbarian warrior and Valkyrie angel

I've been sketching some fantasy artworks and themes lately, depicting a barbarian universe and an eventual clash with an order of spiritually-advanced entities called Valkyrie angels. Here are some thumbnail sketches as well as two artworks of the main characters.
My target in this project is to complete the final scene (the Barbarian-and-Valkyrie clash) and publish it as a separate artwork.
Thanks for viewing.