I have chosen those item each for a paticular reason. The first thing i buy is and 5 this will make you stay in your lane forever and you can anti melee champions by doing this. Since you have your magic resist/lvl You dont have to be consearned. i choose cloth armor early on because i think its needed, especially with his squishyness. A point is also to build the cloth armor to and later which combined with can take many opponents out. After Madred's Rasor i build , Because most of your spells/abilities deal magic damage incl. they have to be build very early on because of his lack of movementspeed. At the moment you buy boots, you will see that you need some armor pen since your runes and masteries cannot cover it. To boost both armor pen and attack speed at very low cost of such sicnificant damage output, only one item can be bought a bonus when you use its active is that it can anti most tanks. Just take 10% of their maximum health each hit with 2,5 attack speed when you have 30 armor pen bonus, magic penetration for madred's b0loodrasor *and your attacks cannot be dodged* which is a very great bonus agianst tanks and Jax especially. Now that we have most of our damage output, alot of armor and magic resist, you need to focus on the health because its now harder to bring down because of your resistances. But before i buy some health for just some cheap survive-ablility i buy thats because its cheap and its better to have instead of the ruby crystal at the same price. the form of my surviveability means that you boost your attacks meanwhile with health and some great chasing ability, the item i buy is called and its quite expensive so i start off buying the smaller parts of it. The first part i buy is to slow down enemies. Then i built some magic resistance to balance your armor and magic resistance to almost the same amount. And finally i buy the last parts of the 3 expensive items for much more survive ability to be unstoppable. And remember to buy before to max your chasing. be sure to remember both and .