Carafa is generally just for color, and just a bit need to be added. I'd expect 8oz max would get you the color you need. I would add 2lbs of a simple sugar to dry it out. I personally would drop the caramel wheat. With the amount of rye in there, the wheat won't do anything noticeable. If you wanted wheat in there, then substitute your carafa for midnight wheat. Just increase the carared if that's the flavor you're after. I don't think the lemony Sorachi Ace and white wine Nelson Sauvin would play well with the rye. I'm piecing together a recipe to likely brew tomorrow, and I'll be looking to accentuate the yeast and rye spiciness with the hops. I haven't decided what that'll be yet, although based on what's in my freezer it likely will be Styrian Goldings and Saaz.