Nice work so far. I would suggest some of the advice printed on the 'net (and posted on youtube and the like) on how to paint black armor. I see you're using a rather dark shade of blue, and that's a good start, but washing the model in black might help deepen the shadows, while a light application of gray/black (thinned) will help pick out the high points with an ultra-thin line on the points of reflection.
Your metallic items (crozius esp) can stand a good washing of dark and then a once over with gold/silver mix as well to make it pop.
Very nice work on the skull as well as the small bits and details! Keep it up!