Malphite is possibly the most versatile champ in this game
I didn't think such a champion existed, but in my last game an AD malphite did more damage than Kalista. They had about the same number of kills, so it's not like one of them was more fed than the other or anything like that. So, he can build AD and be OP, he can build AP, and of course go tanky. Heck, I've even seen him jungle and support on occasion. Is there anything malphite can't do?
actually fits that description better. Can you name an item that would be completely unreasonable* to build on Kayle aside from ravenous hydra?