That's a lot of Aromatic, a whole lot of Special B, not much chocolate, and a terrifying lack of Roasted Barley and/or Black Patent. I'd go with .5-1 Aromatic, .25-.5 Special B, and 1-2 choc/roasted/black patent. Mashing at 155-158 will give you more body and sweetness. You can add maybe 1/2lb mid-crystal (40-70) if you want more sweetness. 002 should help leave your beer on the sweet/thick side as well.