A Rammus buff idea

Rammus is my favorite jungler but like many tank junglers he doesn't have the best wave clear. I suggest his W get changed to this Rammus goes into a defensive formation for 6 seconds, increasing his Armor and Magic Resist by 40/60/80/100/120 and returning 15/25/35/45/55 (+10% Armor to enemy champions and 20% armor to jungle monster.) magic damage to attackers.This ability gains damage equal to 10% of Armor to enemy champions and 20% to jungle monsters.Activating Powerball will remove this effect after 1 second.

So before my buff rammus's W just did a flat 10% armor damage to both champions and jungle monsters. With the buff enemy champions still take 10% armor magic damage but, the jungle monsters take 20% armor magic damage.