Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
This is the tank build i use on my Amumu for 5v5, not sure how it would work on 3v3. Alot of people ask why grab the tear of goddess?? The reason i get this early is to try and get my mana as high as possible, bc when i convert this into the archangel staff a percentage turns into ability power, which also adds damage to my abilities, most of all another 1 or 2 percent to my DESPAIR. When u change this into archangel staff u also get more MP5 at this point u will be able to leave your DESPAIR on the rest of the game, dealing damage to everything around you, especially with 2 sunfire capes adds another 80 damage a second with your DESPAIR. Another controversy is the way i take my ablities, the reason i dont get DESPAIR until lvl 7 is bc it wastes to much mana, i like the immediate damage i get with TANTRUM and BANDAGE, with these two skill they can do alot of damage and get you early kills when you get your leviathan that way you can start getting your stacks up early, dont be afraid to use TANTRUM to finish off enemies ( you need all the gold you can get ). Hopefully this build works as good for you as it does me, sorry i dont have all the flashy pictures that everyone else has but its not my style :P