Grain: looks good, I think you're basically going with Braufessor's recipe which is awesome.
Hops: you might want a small bittering charge at 60 min. I use Warrior to bitter to 20 IBU in my recipe, I could see 25-30 IBU working better for an 8.2% beer. You have 21 oz of cryohops (equivalent to 42 oz pellets) in a 10 gallon batch, seems like overkill and I've heard bad things about using only cry. I'd go 50/50 on pellets and cryo and shoot for closer to 6-8 oz in the whirlpool and 12-18 oz in the dry hop (those are pellet quantities). Citra/Mosaic/Cascade sounds like a good combo, but the Cascade might get lost a bit.
Water: 75:150 sulfate:chloride and a mash pH of 5.2 to 5.3 is a good place to start