OP mentioned snorting their Adderall:
Anyway I am confused by what OP is trying to do. He is taking large doses of amphetamine in the middle of the night then overdoing it on the downers to make sure he sleeps? Why? Why not just take Adderall during the day, enjoy being productive, then if needed do a much smaller amount of downers to help you sleep? I find a single Ambien 10mg is plenty to get me snoozing even when I am still buzzing off amphetamine.
And as others have already warned, mixing benzos and opiates is very dangerous and should definitely not be routine.