Rengar needs to reset aggro.

I was trying to make a team centered on Rengar whom I put RFC, IE and was hoping for BT. Unfortunately this doesn't work because, unlike Pyke, his jump doesn't reset aggro (in Pyke case he stuns those who were possibly attacking him which makes them reset aggro).

This is problematic as what happens almost everytime is that Rengar Jumps into backline and aggro some unit. Before that happens enemy backline will aggro your frontline. If that frontline dies, they will switch aggro to closest target which will be Rengar. And that is fine. The problem is that by that time he builds up mana needed for his spell so he jumps away from the threat. And that would be fine but that jump won't reset aggro which means he keeps being focused by enemy backline that he can't attack and finish now on his own and dies with certainty as he has no innate healing.

Without this being changed, stay away from Rengar he is useless.