Potency is determined by the plant's DNA and the growing conditions. With good DNA and ideal conditions, you will get buds with the most potency a plant can make.
Nothing you can do to the buds will improve potency, not water curing, not leaving plants in the dark before harvest, nail through stem, etc etc etc. All wives' tales.
You can reduce potency by storing buds badly, i.e. exposure to light or temps above 29C.
The best you can do is to not damage potency through poor handling.
hey AL, don't tell anyone but, ........................................
i'm harvesting right now. i have my kerosene heater burning and my fans blowing. i'm in a 20' X 20' foot shop/playhouse. it's almost like a big "quick dry box". lol nothin' but love, my friend.