FED Rengar Has Little To No CounterPlay
I know that I am going to get alot of a hate and negative toxic responses for posting this. Or the same old tips "buy a pink ward" like that stops him from doing anything. Whenever ever a champion in question is claimed to be OP nobody ever really seems comprehend that the champ is imbalanced and defends it.
Ok so through my experience in league out of all the champions that are IMBALANCED when fed is this champion right here. When someone is fed with enough CC you can usually stop the champion but Rengar is a whole different story. Having a built in "sword of the occult" esque passive in the sense the more kills you get the deadly you become with the only counterplay being "don't die to him" because once he has the buff from the kill there is no way to get rid of it. Also when a teamate decides to "run it down top" Rengar is going to Invetiably get fed...
I just played in a match against a Rengar and my olaf intentionally fed for our "awkward team comp" even though our Soraka and Nautilus were crushing bot lane each were positive and had more than one kill each. Mid was 5/0 and I Jinx jungle had 2 kills. Our team had the necessities you would need on a team just the were were played in awkward roles. Everyone was is doing well accept our Olaf. No one said anything or flamed him but after the third death he decided to intentionally feed Rengar eventually after about 7 deaths he said he was ditching top and going mid to take Taric's cs since Olaf couldn't handle his own lane. That just brought Rengar mid and he killed both of them with little to no help from lux. Our bot lane sees Rengar and is walking to his lane to kill him when Nautilus pulls and ults Rengar while soraka is auto attacking him Rengar leaps onto Soraka 1 shotting her in the blink of an eye and doing away with Nautilus. Rengar was about 3 levels higher but CC couldn't even stop him.
Finally, the thing that drew me to make this post is this event right here. I was level 16 as Jinx, Taric and Nautilus were both 15 and Rengar was the only enemy team member at the inhibitor so we decide to gang up on him. I am 2 items off from full build mind you and this Rengar is full build level 18. As we go in Nautilus pulls Rengar towards him and then ults trying to keep Rengar's focus on him but that doesn't seem to matter when our tank Taric sheilds me and walks up to Rengar to keep him off me and do as much damage as possible. He melts Taric, Rengar has about less than half his health as I am shooting him down to finish him off he eventually walks over to close the gap with his speed boost and 1 shots be despite the fact I had distance and his health was less than half. He then proceeds to heal and kill Nautilus. At this point I gave up on the fact that he has "counter play" other than "don't give him kills" and "use a pink ward to see him come before you die" when he's dead. At the end of the match (which happened about 5 minutes later) I click tab and see that Rengar is 49/6/12. Fighting against a fully competent team with little to no help from his own team. He solo carried and there was nothing we could do to prevent the feed and prevent the aftermath of Olaf feeding him.
Other assassins like zed when they get fed at LEAST they 1 shot one person then shadow out after using his ult or like talon dealing damage to many but 1 shotting one person before having to retreat, but Rengar STAYS IN and does the same 1 shot combo to the rest of the team. People could argue that Katarina does the same thing but she doesn't keep you stunned and she is Ap so any damage she takes she is not gonna heal off much of it while attacking.
TL;DR: Rengar is an imbalanced champion that is rather worthless when not fed or has no counterplay when he is fed. His passive is similar to items like sword of the occult or mejais without the negative effect of dieing. If Rengar is going to stay the way he is his passive stacks need to go down when he is killed if this is going to be his gameplay style. Other assassins are good at single target 1 shots and wait for their ult unlike Rengar who's 1 shotting combo is pretty much always up with his ult having little to no cooldown and not really needing it to one shot otherwise. Pink Wards give you vision a future insight of your upcoming death and just because you can see him doesn't mean that your team has the capability stop him if either he is incredibly fed and surpasses your team in items and levels or your team simply isn't built to counter Rengar. No other champion has THIS kind of affect when fed in the sense that you can't escape your inevitable death when he is fed. Even if your team has CC its not enough if he is fed and has more items and levels and he takes down the person who is using CC on them then getting to the squishy ESPECIALLY if someone intentionally feeds him.
Edit: Found the picuture on my phone.
Enemy team: Shaco: 10/9/16 Garen: 4/13/10 Lux: 3/13/16 Ezreal: 4/6/9 Rengar: 49/6/12
My Team: Olaf: 10/16/6 Soraka: 14/14/11 Jinx: 7/13/6 Nautilus: 6/14/16 Taric: 9/14/13