Once the bud sites start forming, removing lower "suckers" probably isn't going to re-distribute much mass. Better to clean that up before flower starts, then maybe some selective pruning later if you think some congestion will form in the ~4weeks of growth that occurs after flip.
this plants size shouldn't require much pruning at the bottom, if at all... a little larf doesn't hurt, and it's good to err a bit on that side if maximizing yield is important. Freeze any larf (don't even have to dry it) and when you have enough, make some bubble hash. nothing is wasted... full utiization.