How would you make Zahel?

We get a little bit of worldhopper character in the Ghostbloods section, but otherwise nothing on other magic systems (unless I missed it)

I am toying with the idea of my players encountering Zahel, in which case I would like to have a statblock for him.

From what I've seen I think perhaps starting with Swordmaster Ardent, give him an Elite Shardbearer's stats, and just overall increase his focus.

What are your thoughts, how'd you make a Zahel npc in this currently Warbreaker-less CosmereRPG?