Just saw this and it looks interesting. Was wondering if you were still taking people? I was thinking of taking a Totemist/Barbarian type (Going into Totemic Rager), although I'm not sure where that would fit into the scheme of things.
As an alternative, I was thinking of going for a more Knight like archetype, although I'm not sure how well mounted combat would go with Incarnum. (Possibly Fighter/Incarnate going into Incarnum Blade)