I must say he is very OP.... if you know how to play him. When i first bought Rengar he felt well balanced and alright. Most games I didn't do so good, but now that I have been playing him forever and main him I do a lot better. Rengar is a very high risk and high reward champion. He doesn't have good pre-6 ganks when it gets to late game and hes not fed he has fallen off. He is very squishy so if he gets caught off in a fight without some peel hes dead and if your not building him full damage then your not actually making him broken. Rengar needs a full damage build or else he doesn't do the damage he is know for and falls off to the point you will have to build a tank that is crap because it has no CC and no damage items for any actual damage.