This is a realy strong Diana Build u could always get Void staff a last item and mercury threads instead but u kinda have 2 play like what is best for you and u have to adapt to your opponent. ** But this Build is so that your passiv will hit alot and do tons of dmg with tah hight ap and attack speed and you will also get a lot of heal so u will be realy hard 2 kill. The Reason u have Ghost and Flash is so u can fast can get near a opponet to R or do the finnal blow u dont realy need ignit for taht with Diana and it also makes it realy easy to escape a gank or if u are low health u cna alwasy use ghost to run awya from them and tehn flash over a wall if need if u get surounded.