Yeah I definitely think that if harm reduction and minimising the aftermath is your goal then don't redose.
However if you are going to redose then a 1/3 or 1/2 dose tops a couple of hours after the original one is the way to go. Thing is all good intentions can go out of the window when you're off your head. That was always the way with me. I'd promise myself and everyone that I'd only do the one pill and then I'd find myself coming out of a nightclub at 9am having been dancing off my nut for 9 hours. Clearly you can only do this by taking a few pills. Even in the early 90s when the pills were super strong and clean, this mean 2-3 pills. Boy did I suffer afterwards.
Last time I indulged, which was after a substantial break, I made my own cap up and only took enough for a single dose with me so no chance of redosing. As it happens I got offered several free halves by people I'd befriended but I was sane enough to turn them down. I felt so much better the next day it's untrue.