Here a perfect Amu guide for Jungler and Full tanks
i played ever with this guide all over the map wayne solo bot mid or jungler
Its only Perfect ^^

Amumu is one of my favourite champs, due to his powerful late game scaling, his exceptional AoE, excellent initiations, and versatilty in terms of builds. I've learned to love each of his abilities, and use them in efficient secquence to bring down the enemy. I am however not the best Amumu player out there, probably not even amongst the top 10. But with the experience and expertise I have so far displayed with the champion, I hope to be able to help you become better too.
If you have some of your own tips and tricks that you wish to share, please feel free to share in the comment section below, I am also open to all critique and feedback concerning the guide, as it is my first.
Thank You :)

I ever began with Tears of Godness then Ninja Tabis --< Archangels Zepter
Warmogs , Nature Force , Randiums and it end with Sunfirecap

As Jungler the Q skill is very important but i would start with the E or W skill
for more damaga :)

I would take as D & F Skill Cure & Flash because
Flash is perfect comibnation with Bandage Toss and cure can help your
mates and you too :)

Pro- Nice AoE
-Perfect to jungle
-Ulti is fantastic for late fights
-For Early and End Fights perfect
-My opinion world best Tank with awesome damage without ap things :D
-Bandage Toss perfect to flight
-W Skill with Archangels Zepter = Unbelivable
-Passiv is good too

Cons-Ranged often Ban
-A Bit Slowly
-When Q Fails when you jungle its bad :D
-You must have skill to play him Godlike ;)
-He´s never free to play :D