Heh.. he never heard of 1 by 1 pull technique and greed sensor. According theory in gachalogy, when pulling 10 times in one pull, 1% rate will be divided to 10, reducing the 1% rate. If you pull 1 by 1 pull, the 1% will go to one pull only.
Also don't aim for the item when pull. Relax your mind, think of nothing other than pushing the gacha button.