Oracle, but I think he meant build AP like, I don't know, going mid troll.
Janna AP mid etc.
Varus is op, with AP, and it fits Alex Ich's style, i'm surprised he isn't running AP Varus.
Varus has never been op. He is like the easiest champion to counter. You can just gank him and he will not escape. Maybe he will use flash once 5 minutes but otherwise he won't. He has no escaping abbilities and every skill is a skillshot wich you can easily dodge. His ulti is weak as hell if built like an AD carry. Also AP Varus is better when there are shitloads of tanks in enemy team. You can just trigger your blight and deal tons of damage but otherwise AD Varus is much better. As you don't have any escaping abbilities except flash you will need to poke enemies with your Q and finish them up with his standart combo. Varus should be buffed a little bit to compensate his low mobility. If you suck with skillshots don't play Varus. Or train against bots. Otherwise you'll just be dominated the whole game. Predicting opponents movement is like the coolest thing. Every hit with Q makes me happy. That is why he is my favourite champion.