[SUGGESTION] Kha'zix's fourth evolution

Good evening Summoners, I am posting here because I would like to discuss about Kha'zix's evolutions.

After having discussed with a very competitive Kha'zix top lane main, I have come to agree with his point of view regarding the quest you receive when you face an enemy Rengar (needs 10 stacks on his passive) and you both are at level 16: The Hunt is On (of course, Kha'zix needs to evolve three times, but I guess it's almost... impossible to don't evolve your skills, after all?).

After a lot of fixes and patches, Rengar cannot lose his trophies when killed and will continue stacking upon reaching 20 stacks, granting him full power as long as he continues doing what he is designed to do. When he wins the side quest, he immediatly reaches 20 stacks and gets more vision while hidden in the bushes, while Kha'zix earns his fourth evolution point if he wins.

With Rengar not losing his stacks, this side quest is not as game-breaking as it was before, Rengar-side speaking, while Kha'zix gets a great power-spike if he manages to win (with the current values on his damage). Now, the side quest is a nice touch for the game and the lore, but:

• Rengar will eventually reach 20 stacks and he will obtain his full potential.
• Kha'zix won't even reach his full potential if Rengar is not present, and if he is, Kha'zix has to fight a sort-of fed Rengar (10 stacks required to get the side quest, so 10 kills or 10 assists, or mixed) and, 1v1 speaking, Kha'zix is weaker than Rengar. If Kha'zix gets his fourth point, he gets a huge boost with his current damage values, but if we can modify his damage output to permit the option of upgrading all of his skills, it would give Kha'zix's players the option to adapt to all the situations they can encounter in the early-mid game, because they could choose the right evolution without worrying about leaving behind one of the four evolutions.

I think Rengar getting his 20 stacks every game without a backlash is not fair for Kha'zix, because once was acceptable because Rengar would lose stacks upon death, but now it's a bit one-sided.

In my opinion, a good option to fix this situation is to give a sort-of quest to Kha'zix if he is present in game, meaning when he gets level 16-18 he has to kill the most powerful (fed) champion in the enemy team, assists count (like Garen's villain passive, only it appears once and if Kha'zix gets killed and the marked champion assisted the kill, Kha'zix won't ever get the chance in the current game).

This is just an opinion, but I hope this could help or open a discussion for the current situation of Kha'zix.

Cheers, Vallende Ster.