Hello, amumu one of my favourite champions on jungle. Can easily clear jungle and with strong cc you can help your laners to take scores. A jungler with gap-closing stun, simply annoying.

Begin with blue golem, you can fastly clear jungle camps so you can take wolves and wraiths too if you are tough enough. Then take lizard and begin your gangs.

Dont start fights with your q, its your only gap-closer skill. Open your w and hit with your auto-attacks and e. Due to red buff enemy will get slow, if enemy has some skills for run such as renekton, zed etc. then use your q for stun and slow again. After six level make some gangs with your ulti at bot lane, aoe stun is awesome.

You can start team fights with your q, then r. Or flash to the middle of enemy team then use your ulti, when your ulti's impact gonna finish use your q again on their ad or ap carry which has been focused from your team-mates. Then go for tanks, while your w on :)