i take boots of switness because i need run speed to catch enemys / run away
i take zhonya second item because i want alot ap fast.
i take archangels last inventory because i want be maxed ap + alot mana so can spam skill
when u have those items u hav ap like 1050 exept when u farm with veigar ap u can hav more :P when u sell ur boots and buy 1 more archangel u hav ap +1300 :P
have fun time remember rate
this build work all ap heros
its the best build i know