Some potential buffs Kha'zix could need?

Everyone, let's face it. Rengar is way OP than Kha would be. I have tried 2 customs games, with each Rengar & Khazix, just to practice & test out the pros & cons the both have in them, and I made a conclusion. Simply to put the fact that Rengar:

• Is costless, Khazix is not (....no shit)
• Has lots of sticking power, Kha only has a slow (only depends where enemy is walking into, eg. Bushes)
• Has instant burst in any situations, Kha has conditions to have bursts.
• Tankier than Khazix due to natural Armor/Mr gain, which Kha doesn't possess.
• With proper builds, has better sustain than Khazix (I think, not certain about this one)

For now, as a Silver 3 tank jungler main, I have decided to try mastering Assassin junglers before I try to climb to Gold, since there's no benefit to always be tanking for a majority of Bronze-Silver teams who doesn't know how to deal damage for themselves. However, I've seen the fact that Khazix's pickrate is way lower than Rengar does, which I guess Kha's kit is kind of clunky if not played right.

Below are some potential buffs which I would suggest. You don't have to agree to it or anything, even I could think I'm still the noob one.

Q- Taste Their Fear- Now applies on-hit effects, such as proccing Life-steal. Remove on-spell effects.

I really think this type of change would benefit Khazix a lot, considering the fact that he always has to dive into the middle of the fray, or all the way to the backline to assassinate the squishy carries, whilst in the danger of getting shutdown quick.

W- Void Spike- Heal changes from 60/85/110/135/160(+50% AP) to 60/80/100/120/130(+55% AP)

This is just to compliment the Q changes, only hurts a bit for late game

E- Leap- Look at notes below

There are 3 things which made me think Khazix's E looks clunky compared to Rengar:

• kind of slow.
• easy to interrupt, even in its evolved form, as in getting pulled, snared or knock-up
• I'm always in that WOOOOO moment during his jump, and gets distracted easily. Must be just me :p

There are a few buffs I would suggest, but not necessary to apply all:

1. During Leap or Evolved Leap, Khazix is immune to crowd controls.
2. Increase Leap's cast speed a little.
3. Evolved Leap: For each successful kills/assist, Leap's next mana cost reduces by 10 for 5 seconds.
4. After landing, surrounding enemies gets slowed by 40% for 0.5 second.

R- Void Assault- Evolved Void Assault: After unstealthing, he gains 30% reduced damage for 2 seconds.

I read that his ult used to have damage reduction, only during his stealth. I wonder why was it removed. But anyway, it would be pretty beneficial if it were to be placed after he unstealths, something for his natural tanky side. I heard that a majority of Khazix mains simply ignored evolving Void Assault, simply because it really doesn't benefit much aside from the fact that all it does is "become invisible more".

Well, there you have it. This is all I can think of in order to get Kha get back on his feet. Sorry if the numbers, or buffs, offended anyone. If you really think Khazix doesn't need any changes, then it's ok. Maybe people just need to practice more. Share your thoughts on which buffs you prefer, or if none of the above, add some on your own. I really want to hear anyone's ideas & opinions on this.