“He can never ever contest you. Try to double scuttle, run him down in the jungle and invade him if you have priority or are strong enough to kill mulitple enemies even if they collapse on you.”
“Just get tenacity against Amumu. Legend: tenacity or Merc treads. He doesn't have that much dueling power if he doesn't go full ap.”
“You can kill amummu pretty much all the time before you reach the late game where he has a lot of tank items”
“Helpless mummy can't do much about you, he does not have the damage and outside his ultimate he doesn't have enough reliable crowd control. If he's in a bad position you can easily kill him as he has no reliable escapes either.”
“ [5/10] This matchup shouldn’t be overly difficult as long as you play around his bandage toss as that’s his only engage tool without ult and flash. You can abuse him early with invades and counter ganks as you should win easily if you avoid his stun or get the jump on him.
Once he gets items he will pose more of a threat and especially during teamfights, so try not to leap in while he has his ultimate to protect his backline. Q evolve and W evolve will be valuable in terms of dueling and disengage to deal with the matchup. Most Amumus will go tank and mostly be a threat during teamfights but if they are building AP, then be sure to not let them snowball through the early-mid-game and pick up Merc Treads if possible.”
“Poor guy got balance whiplash in the early season, but is still stronger than he used to be. Rare enough so that I'm not sure of his current power curve, but as long as your lanes are even, you should get every crab and maybe even a buff or two. Don't be shy about walking in and taking his camps after you hit 6 and all major and minor objectives have been taken. If he lands his bandage, wait for aftershock to expire before retaliating. Just don't be greedy and let him lock you down while he has friends on the way. If he's building full AP, make sure you engage him while healthy, as his ratios are nothing to sneeze at, and you should win handily. ”
“Amumu won't invade you on early game, so you'll be alright.”
“he has a good ult and he is tanky with that said wait for him to use his ult and then go for a teamfight...he helps you more cause everyone will gather because he stunned someone ”
“Amumu has no reliable way to escape from Rek'sai, and with conqueror you will always win this 1v1. Look to punish him in the early-mid game. The later the game goes, the harder it will be for you.”
“You beat Amumu early game on equal footing. Do not fight him however if he has an HP advantage.
Mid game it can become quite hard to punch through his Aftershock keystone as base Kayn. If he has another keystone you are able to out-duel him. Try your best to dodge his Bandage Toss (Q) with your Reaping Slash (Q). Avoiding stuns is crucial to winning a fight. Consider building Mercury's Treads.
As for late game, Amumu becomes jungle food if you have chosen to go Rhaast. Your Black Cleaver will melt him.”