First, http://www.mobafire.com/images/item/ravenous-hydra.gif the hydra why? it give you first attack damage to kill you enemies after, it give u life steal, with that u don't need to recall and it give u base health regen + if u spin and u do the special of the hydra u can kill minion in 2-3 seconds

After, Your text to link here... the boot for ultra speed and reduce the slow effect+u have with the enhancement 20 movement speed bonus

the third item is the Your text to link here... because it give you health: it's good for your survive, it give you attack damage to kill enemy, and u have the stack of reduce armor to kill the tanky.

The bloodthirster for 20%life steal and full atack damage

Infinity edge for crit when you spin

and after, essence reaver(personnaly i never get this item because the game end before) but it gave you mor life steal for a total of 42% and 80 attack damage for ultra damgage (with all this item just your spin will do a total of 3000 damage+you decisive strike equal to 500-600