Run run my old mod packs in stock and 19T. When the run times aren't good enough for Mod they are great for stock. After a few months of Mod runs the IR gets lower and the voltage gets higher.
I under stand about discharge curves and the theory that you still need runtime for stock to stay in the higher voltage portion of the curve but when I cycle a 350-360 sec pack at 30A it will hold 7v+ for 300 sec. 300sec of good voltage is all you need.