seriously i cant figure out how you can kill someone who is stealth, jumps on you without having to target and one shots you.
edit: i can pink ward but he is still going to jump on me and one shot me.
double edit: i can cc him but he is still going to one shot me
tripple Edit: i can kill him but he is going to one shot me
quadruple edit: i can group with my team but he is still going to one shot me
TheThundersRoar2 votesStack up.
If he jumps into a stack of 3+ players (2 if fed) and still kills you before CC/burst/dash out, then I'm sorry, but the stacked players are just bad.
Rozair1 votesits imposible to react fast enough to his q.
TheThundersRoar1 votesThe last time Rengar was patched his upfront damage was shifted to his Q's AD steroid. He now needs a couple seconds to take you out. You should be able to hit him with a stun/slow and get out of his range if your teammates are close enough to you.
If he goes MIA during a stand-off, or his teammates start getting aggressive for no reason while he's MIA, or you're alone and he's heading in your direction, someone's getting jumped on. Keep an eye out for the ! (you get about a second of ! before he jumps), predict his target, and nail him when he jumps out. The warning + predicting his target lets you pre-aim the skillshots/be ready to hit him as soon as he comes out.
Additionally, avoid wandering after the midgame, stay in groups, and don't get separated in enemy territory. Watch out if you're split-pushing in a lane and his location isn't known, or if you're in a side lane and the jungle next to you is unwarded. You're his main priority and you should act as such.
If you can't see him, assume he's coming for you.
AMYS GRAVE1 votesdont be valuable enough to jump on.
Calabok1 votesBuy Zhonyas and have team turn him into slippers
Zone of Endless1 votesYou kite back the moment you hear him ult so you can isolate him from his team.
If you group and he can still kill you then that's your/your team's fault.
Noksterz1 votesStack up together with team. Make it almost impossible for him to pick his exact target in the crowd of ppl. Then as soon as he appears...cc him to death. Also...kite him away from his team when you know he ulted to burst him down as a team easier
The Whamboozler1 votesThere is little counterplay to his ult-bomb. The way you beat Rengar is to keep him from getting TOO fed... build a little more defensively than normal if you are at ALL able to (Steraks on an ADC perhaps. Rylais/RoA over Ludens on a mage) and make sure you can survive his initial burst.... and then... stay grouped. If your team wanders around alone a lot the kitty will get fed and roflstomp you. He's a terror in low elo for JUST this reason. Everyone is scattered doing their own thing and he'll just jump isolated targets (and he will KNOW they're alone the moment he ults) and get kills. Then he's fed and then he CAN divebomb into five people and insta-kill your carry.
But if you don't let him get huge... (I'm not saying he needs to be 0/8 or whatever, just don't let him get FED) you stay together... and you tweak your build a LITTLE to survive his initial burst... he should not be able to mess with you. If he dives into 5 people and then dies to CC lockdown and your teammates... AND he didn't kill his target... he's useless. If he dove the adc they can even lifesteal back up to full after he chunks them down to 1/4th health and then dies. TADA! Now go slap his team around 4v5. Your less than full damage build should still suffice to beat a team that's down one man. If not... there were other problems besides Rengar.
Or just get a good 
on your team and stand beside her at all times. Rengar freaking HATES .
Shadowatom1 votesedit: i can pink ward but he is still going to jump on me and one shot me.
double edit: i can cc him but he is still going to one shot me
tripple Edit: i can kill him but he is going to one shot me
quadruple edit: i can group with my team but he is still going to one shot me
If you're just going to shoot down every piece of advice with, "...but he is still going to one shot me", then why are you even asking, he's obviously just going to one shot you due to the fact that you're refusing to take the advice. There's no sure fire, "he definitely won't one shot you if you do this little trick", but these are pieces of advice to lessen the chance or give you the possibility that you kill him before he can, if you're going to dismiss them because he has the chance of one shotting you if you/your team screws up, then why ask?