Let me explain about the items, boots and three pots because the level 3 can ganks quicker, Will of the Acients per Spell vamp, Nashor's Tooth Attack Speed ​​and cooldowns you will enjoy your passive because it derived from the attack speed you will give more hits and your liability will activate more often and strips more damage and you'll also minimize your cooldowns for the next attack, Athene's Unholy Grail you'll need a lot of mana because it needs a lot of mana for the skills, Zhonya's Hourglass for the passive for when you do not have cooldowns , Boots of Swiftness to make you better movement speed because if not you use you will be with 390, Movement Speed...

Too you can play mid to Diana but not advise