Full AP Malphite OP? - Check it out!

So I was told that Full AP Malphite can be op. I recorded a gameplay and made the kills into a montage to record the absolute burst. I wouldn't say op, because you're pretty much limited to one combo and rely on your ult. Also, you're not tanky at all if you go fully AP. Let me know what you all think! https://www.youtube.com/watch?v=BfiOk0iNia8