Black Patent is for stouts, leave it out. I personally don't like that much crystal malt, but it's your beer. Also, and this is just a suggestion, why not replace the pure sugar with something like maple syrup? That's what I use for my Imperial Nut Brown and it's excellent. Check out my recipe if you'd like. It's extract, but easily convertable to all-grain. It's the only extract brew I still do since I didn't wanna mess with the recipe.