The Amumu changes go into the wrong direction
's problem isn't his tankiness. It's being extremely blue reliant and bad at dueling early on, just like
, which is why both of them get wrecked early on by experienced junglers on meta champs.
doesn't need extra armor scaling on his passive. He needs an adjustment for his abilities' powercurves. They need to start at a higher value. Similar for
, though in his case a rework for his W would be nice as well.