Originally Posted by iDpark
Janna beats Cait harass with sheild, and beats nunu. Straight up.
Iceball is pretty easy to shield against, but it does take a skilled Janna to react during the sound of Cait's Q to shield in time. I know I had to practice my shield mechanics to be able to do it right and I still fail if I'm not focused enough.
But you're right, Janna is great for stopping Nunu and her shield is great for dealing with poke. You can also do things like shield self, then block a Caitlyn ult when the target wouldn't survive even with a shield.