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 not a tested team build, just something i cooked up in my head. The only problem i see with this is that this is VERY magic damage heave (all the ults do magic).
Nunu, Amumu or Fiddle can jungle, no issue there, do what is comfortable.
the general plan of action is to have amumu initiate, once amumu lands his stun, fiddle channels his ult while galio and nunu run in. nunu and galio channel at the same time in the middle of the enemy team, and by this time fiddle's ult should be going, lowering the enemy MR and MF ults over all this when it's safe (usually when galio's ult is going)
Again this isn't tested, so this is somewhat of a joke build.