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.
It's a team based on the team fight, because there is a lot of CC, specialy with each ultimates, if the coordination is good, the ennemie team can do nothing versus you !
In the beggining,amumu go in jungle and take the first blue, when it's possible, he will let it to morgana in the mid lane.
At top, kennen will not have problems with his stun and his rush (a good escape if you're ganked)
bot, Ashe just need to farm a lot and gain the most important gold avantage with the passive of the e (5 gold more in each last hit at lvl 9), somes amumus gank on this bot lane will give you an important advantage ;)
When there is a team fight, let amumu engage the fight with his bandage or the cage of morgana touch an ennemie, when it's do, amumu will put his ultimate first, then, go with the sona's ulti, morgana's then, Ashe and kennen, if the teamwork is good, the entire ennemy team is dead, and you probably have no death :)