Farming in League of Legends is not frankly about last hitting every minion accurately. It's about accurately catching, pushing, crashing, and bouncing waves to grow the number of waves you obtain. Merely farming a wave and letting it slowly push out denies you several waves of the farm that you could have gotten. Pros manage to have more vision down and push more safely. They also fight much less, so they naturally spend more time farming. I have learned this from a Youtube video and the script I have been using lol-script. Sadly, I am still not that good at it yet.
