A mini rework Amumu could use that would make him a viable pick in higher elo and perhaps Pro play
As the title says...
is currently sitting at a 47%-50% win rate:
http://na.op.gg/champion/amumu/statistics/jungle
http://champion.gg/champion/Amumu/Jungle?league=%24
Q: Bandage Toss
New Effect Now applies Curse
W: Despair
New Effect While active,
gains 20/25/30/35/40% damage reduction (5% per 100 health scaling) to all sources of damage, including true and percentage damage, all ranks
E: Tantrum
Physical damage reduction removed
New Effect Abilities now reduce Tantrum's cooldown
R: Curse of the Sad Mummy
Cooldown decreased from 150/130/110 to 130/110/90