Defense against Rengar

/surrender, or be a juggernaut.

Your teammates (including you) kill rengar after he plays like a dum dum and jumps onto 1 of you. One of you dying is inevitable, but that's a 5 second window where rengar doesn't do much damage without abilities or ferocity. Do not splitpush, unless you're someone like garen/nasus/urgot that aint afraid of rengar jumping towards you and can instead murder him if he does that.

youavoid letting him get fed in the first place. Same as ANY fed champ, naturally theyre gonna tear you a new asshole.

He's the same as zed but with more leeway. You have to stun zed as SOON as he comes out of his ult, but with rengar you don't have to worry about him teleporting away. Hell, if i'm on Ahri, I can charm him while he's visible mid-jump 80% of the time before he ever even lands on me.

He can't kill you in grey screen!