The items in the Lane category have two tracks to follow: Ranged and Melee. Buy ranged items for lanes where poke is dominant over brawling to keep your pressure up from range. For the opposite type, buy melee items to put up a strong fight, because there will be a lot of them. In either one, Bullet Lifesteal is a valuable healing tool, although it can be harder to use in more poke-heavy lanes. You should buy all of them, but the order can change how you handle the lane.