Sorcerer's Shoes - all now (mov. speed and magic penetration).
Nashor's Tooth - me get this item first because gonna do some attack speed, cooldown, mana regenand ability power. and when me get the 6 itens me sell that item and get Moonflair Spellblade to get tenacity.
Lich Bane - some mana, magic armor, ability power and when hit some enemys deal a big bonus demage.
Hextech Gunblade - to get some attack demage and ability power and spell vamp. the life steal serv for nothen, but is the best item to get attack demage and ability power in same item.
Void Staff - more ability power and more magic penetration.
Rabadon's Deathcap - ability power and 30% of all of you ability power in bonus ability power.
Moonflair Spellblade - when get Rabadon's Deathcap you sell Nashor's Tooth to buy that item to get some tenacity (35%).