WHen you are at 4-5 items and the team fighting begins, EVERY SINGLE FIGHT is win when you land your Q into enemy midlaner or ADC.

REMEMBER you are not tank, when you engage its ALL-in.

If you Q into enemy tank, you die and you are useless.

Ap Amumu is really strong mid elo carry (silver, gold, plat), BUT before you can start own with Ap mumu you have to have good experience as amumu, because when you play tank amumu, even your Q's dont hit you can still be useful by taking damage and peeling for your ADC

As a AP Amumu your Q MUST HIT!, specially in mid game when you gank botlane, if you hit your Q into enemy ADC its gonna die instantly Q -> R -> E while W is on.

PROS:
-MASSIVE Area of effect damage burst
-High CC (Crowd control)
-One of the best Team Fighting champions
-Fast jungle clear
-Easy ganks
-Really fun to play
-Game changing ultimate
-Massive damage over all


Cons
-Early mana problems
-Hard to master
-If your blue is stolen, you will drop behind.
-Hard to play from behind.

AP amumu is one of the best champions for low elo soloque pushing, (i played bronze 4 into gold 4 as Ap amumu)

The CC and massive damage from good ultimate is the thing how you win games, example when you hit your Q into enemy ADC and followed by R,E you will 1shot him and now you have engaged their team. At this point its 5v4 and enemy is most likely running away which in most cases gives you Baron, or in very late its gonna win the game.

At the start of the game, DONT kill red or blue, you can start where ever you want and farm how you want, you just need that 550g and you go back, after this you get trailblacer and x3 potions, now you take red & blue and you are ready for first gank!