Getting the Boots to start of gives you that little extra speed in the beginning so that you can either get out of a bad situation or chance down an enemy. If you notice Zin has some massive movement speed at the end game making it almost impossible for an enemy champion to get away. The Frozen hammer is always where you want to go after the boots because it slows the enemy down and gives you a nice chunk of health. The Madreds Blood-razor is really nice because it gives you Attack power and speed, plus it does 4% of the enemy's max health in magic damage. And for the cherry on top just stack yourself with alot of those Phantom Dancers because at end game you will have max Attack speed, crit almost everytime. And have a really fast movement speed.