how dose this look?

so im working on a recipe for a russian imperial stout this is what i have so far..


Russian Imperial stout
8 gal batch


21.5 lbs Maris Otter Malt
4 lbs Munich Malt
1.2 lbs Crystal 80
1.2 lbs CaraMunich Malt
1.2 lbs Chocolate Malt
1.2 lbs Special Roast Malt
1 lbs Special B Malt
1 lbs Roasted Barley
1lbs Flaked Barley
1.2 lbs corn sugar (boil 90 minutes)
Hops
1.75 oz Northern Brewer (9.0% alpha acid) 60 minutes
1.75 oz Challenger (7.5% alpha acid) 60 minutes
1.2 oz Target (10.0% alpha acid) (20 minutes)
Yeast
1Pack Wyeast 1028 London Ale yeast