That is a lot of dark roasted malts for an average gravity beer, plus you are adding more roasted flavors with the coffee addition. You can still use a mix of the three malts, but I would cut back to 1.25-1.5 lbs. I would keep the whole pound of roasted barley and decrease the choco and black patent. Toss is a little more 2-row to keep your gravity where you want it with your system.
Fermenting: Traditional Bock, Belgian Dark Strong
Conditioning: Munich Dunkel, Belgian Amber
Drinking: Baltic Porter, O-fest, Drought Stout, English Summer Ale