you need blood boil to gank well, flash can be used to chase too. Good luck getting your ult off with no health or armor. You should never go straight ap, 3k health is fine but with no armor and mr you will die instantly, you seem to think nunu is a solo fighter when he is all about team fights. Also you make Nunu seem OP, which he definitly is not. However if you are going to go straight AP then you need more than 423, alot more, and linch bane is not a good item for him. Check out this build, the bottom build is a much better AP NUNU http://www.mobafire.com/league-of-legends/build/who-let-the-yeti-out-90356

you need blood boil to gank well, flash can be used to chase too. Good luck getting your ult off with no health or armor. You should never go straight ap, 3k health is fine but with no armor and mr you will die instantly, you seem to think nunu is a solo fighter when he is all about team fights. Also you make Nunu seem OP, which he definitly is not. However if you are going to go straight AP then you need more than 423, alot more, and linch bane is not a good item for him. Check out this build, the bottom build is a much better AP NUNU http://www.mobafire.com/league-of-legends/build/who-let-the-yeti-out-90356

Yeah they're spot on. First off, Nunu is a jungler. No, not because he is lighting fast and has godlike ganks. Because he can take the enemy jungler and make them wish they never queued up for that game. Also, Banshee's is a must have, before level 6 if you can. You want your ultimate to wreck everybody. And RoA is way better than Rylai's on Nunu.

And also Trojan, I actually use 1/16/13 masteries on Nunu and start with Ruby Crystal unless I'm dead-set on counter-jungling, in which case I do go the old boots and 9/0/21 route.

Although as of late I've been using 9/0/21 more and more, counter-jungling or not.

well actually when i play nunu i jungle with him so i take smite and flash and i start with a ruby crystal (to build next into a RoA)

Actually, there's some things that I disagree with you:

1. Nunu, when jungling, starts with boots. It's because he can and he's that good at it.
2. Ignite isn't great on nunu; he's kind of a tanky CC-bot support. So, exhaust is great on him (flash and smite are ideal, but this isn't a jungling guide :/).

-1 because of 2 things :
1.starting with boots make you too much squishy (starting with doran's ring is better)
2.you absolutely need blood boil to iprove your MS and AS or the carry's

plus i agree with trojan995 that RoA is a must have and 9/0/21 are better for nunu

and for summoner spells i would have go for ignite instead of exhaust because you already have a slow

(sorry for the grammar mistakes but english isn't my native language :))

Here's what I found wrong:

1. You're not jungling.
2. You rush 2 glass cannon items.
3. Banshee's Veil is your 4th item, should come before tier 2 boots even (depending).
4. You bought rylai's crystal scepter; the two offensive spells you have are slows, you don't need a teeny tiny more slow. RoA is far better on nunu.
5. You go 9/21/0; 9/0/21 is far better on nunu.

Lich bane seems like it could be good on nunu, but that's my list of grievances.

Alright, I got a down vote. I'm not mad about that, but if you think it's bad tell me why please. I want to improve this guide.