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.
As of late I have really been trying to really press the idea of GOOD Team compilations on myself. Maybe not always getting a good team, but trying to find certain character pairings that would work. The Nunu I play usually is an off tank, simply because there are better tanks for the job( Mumu, galio, shen, rammus, etc ). All of which can help You actually get a good ultimate off during a team fight. One of the biggest things for nunu is drawing CC away from your carry/mage. One of the reasons you see all Nunu's carry a banshees veil is because it forces the enemy team to use atleast two skills on you. Somethings its easier said than done.
I like a jungle nunu because its better for a team as a whole two have two characters who are significantly higher than the opposing team. You probably will see this is higher ELO games! Also having 2 smites is a great way to clinch a baron buff, or a dragon kill.
My Jungle Rotation goes as follows:
its pretty much open from there. I personally like ganking at 4 because its always good to get your team some gold, or get an early level 2 shoe. Always be aware of your minimap, because while jungling its your responsibility to know whats happening at all times.
Anyways I dont want to get too indepth with this because I am just assuming you have all played enough to know the basics of the game :) Any questions? Feel free to ask! :)