PATH & PLAY for YOURSELF. A simple yet effective way to play the game is to path towards what you think will net you kills with minimal risk of dying.

Blue Side Full Clear to Bot Lane

Red Buff > Krugs > Raptors > Wolf > Gromp > Blue Buff

Blue Side Full Clear to Top Lane

Blue Buff > Gromp > Wolf > Raptors > Krugs > Red Buff

next check if you can gank
if you can't then you make scatter and possibly invade the opposing jungle

Red Side Full Clear to Bot Lane

Red Buff > Krugs > Raptors > Wolf > Gromp > Blue Buff

Red Side Full Clear to Top Lane

Blue Buff > Gromp > Wolf > Raptors > Krugs > Red Buff

next check if you can gank top or mid
if you can't then you make scatter and possibly invade the opposing jungle

Why don't you do a blue buff right away by doing a full clear? The answer is very simple by doing a clear in this way you speed up the spawn camp which spawns faster on the map than buffs
so your clear will be very effective

simple but works every time if you do full clear

3 Camp Clear Early Gank

Raptors > Krugs > Red Buff

very good clear if you want to make a very fast gank or counter gank by going into this clear
you can surprise your opponent in a very easy way.

if you see that in a given game you can do this 3 camp clear to gain some benefits in the game,
this clear is highly recommended. Regardless of whether the gank works or not,
your next option is to invade the enemy jungle, gank mid or just go back to your jungle to farm

as you can see you have many options after making a gank

As Kha'Zix you have to try to catch solo targets, you see that adc, support or mid is suddenly solo, immediately try to catch him to weaken the opponents chances of winning the teamfight
as much as possible.

Keeping your eyes on the map and on the enemies is vital at this point.

In order to win teamfights as Kha'Zix you need to ensure that teamfights are favoured in your way.
Just hiding in the bushes waiting for a potential victim will greatly contribute to your victory, because either you kill the opponent or the opponent will have to use Flash, and the fact that the opponent does not have Flash can greatly contribute to victory in teamfights

When it comes to escaping with Void Assault the most important thing that will allow you to lose your opponents without a problem is to simply change the direction of your escape, this is the easiest way to lose anyone, I also recommend using all kinds of bushes, 100% the opponents will lose you immediately and will have no idea where you are at the moment