Ok. Before this thread gets out of hand and into another nomenclature battle (even though there is a clear line between black IPA/American porter/american stout
) lets get back to the OP.
I think your beer will be very good as is. I personally would sub out the carahell, oats, and cararoma for some C40 or C60 and add 2-4 oz of chocolate. Don't be afraid to go crazy with the hops in this style (I used 18.5 in my last BIPA... Overkill maybe lol). Other good hops IMO for this style are chinook, Simcoe and Galaxy in addition to what you have. Definetely dry hop. Mash between 150-152. If you're into water, boost your sulfates to around 250 ppm and there will be no mistaking this beer for another style. I've used 001 and 007 yeast in mine before. Both made great beers, so 1098 will work well.
Black IPAs are great transition beers for spring and fall. Good timing on this one!