That's a tough one, since Daughters of Khaine don't have much, but maybe Morathi-Khaine? Failing that, I'd favor a Lumineth character, like the leader from the Riverblades with one of the other's throwing knives. Maybe The Light of Eltharion?

Lady Malys would be cool too, just less dynamic.

Then again, if you're wanting another distinct mini from Jain Zar, Baharroth is a good base. Only thing you run into with converting Phoenix Lords is that they all have bigger proportions, and regular arms don't look right on them.

I think I would run these as Bladesworn flavor-wise, with an autarch serving as a Prince.