FIRST OF ALL DONT JUDGE THIS BUILD WITHOUTH TRYYING IT COUPLE OF TIMES FIRST ALSO NOTE THAT THIS IS MY FIRST GUIDE AND ENGLISH IS MY SECOND LANGUAGE
Diana, my favourite champ i started using her when she came out, before i used akali and it was kind of handy and easy to master diana because they are practically the same

Basic runes of an ap

WITH AIM YOUR Q WILL BE A KILLING MACHINE AND TAKING W AS YOUR SECOND SKILL GIVES YOU A SHIELD THAT BLOCKS EVERYTHING

I always choose them but if you want to try other ones feel welcome

Usually diaa players make ap and thuis build is excellent for your passive and you are kind of hybrid so if u want to put an ie instead of a lich bane it can also be a good choice

Q-E-W GOOD FARM i usually recommend this squence after nashor cause the mana regen before only q

Well hope i helped and perhaps you ca help me improve this build XOXO