This guide is made for me and myself only by picking up things from my own gameplay and from other guides here on mobafire (I will link to those guides here).

people are welcome to comment and give tips and hints on how to become a better player. I might integrate that into the guide aswell.

Greater Mark of Insight: These are useful for dealing higher damage all throughout the game, bypassing some magic resist of champs. 8.5 magic penetration is very useful when combined with Cursed Touch.

Greater Seal of Resilience: These runes are absolutely necessary in order to jungle with Amumu. If you don't have them, there is a high likelihood you will die.

Greater Glyph of Shielding: Because extra magic resist is always useful on a tank, and the jungle monsters don't deal magic damage, so scaling runes are the way to go here for a better late game.

(text above was picked up from that trev persons lovely Amumu guide)

Greater Quintessence of Ability Power: My personal favorite. I usually play with friends where we got a good amount of cc. (warwick, lux etc.) So i choose to get a bit more dmg out of my runes.

TEAMCLASH:

Activate your W. Flash in if it's not on cd.

Hit your R.

Hit your E.

Then hit your Q on the teams focused target.

early game: amumu is not the strongest champion early game nor is he the weakest. you should be the one going top-lane. Get as many minions as you can and keep the jungle empty until you hit level 6 (curse of the sad mummy), and get your sunfire cape.

mid game: keep focusing on last hitting minions and clearing the jungle. start thinking about ganks, there is no chance you'll loose a clash 3v2 if you press your "R" at the right moment.

late game: If you got all the items needed you'll be the one devastating the game. When clashing get the AP casters or their carry.

info: you'll get gold and levels quite fast when playing amumu, use that to your advantage. when you hit lvl 6 don't be afraid to engage, trust me it'll be like a warm knife cutting through butter.

work with your team. you should either be the one engaging: "W" -> Flash-> "R" -> "E" -> "Q" Or be the last champ entering using the same sequence. remember if you're the last one entering, timing is essential.. you DON'T want to let your teammates die!