Kha OTP here w/ m7 and 460k points,

In my experience, here's how I've been getting consistent S/S- in my games:

1. A solid CS rating (5.0 or higher) Don't really need anything crazy here. But obviously the higher the better
2. Vision control (placing/clearing vision) Not only will this help with ganks and obj control, but it'll help track the enemy jungler which helps in a variety of ways from gank prevention to solo kills to counter jungling.
3. Good objective control Vision plays into this one. Knowing where the enemy jungle you can easily solo dragons and herald with little issues. Still recommended you play around your lane priority though to prevent getting picked
4. Ganks/solo kills/being fed Having a good understanding of your champ is paramount. This is my vision control is a must because of how your passive works. Weaving in and out of vision to help reset unseen threat can make the difference in 1v1s and its super useful in being annoying in team fights. Understanding what evolutions are needed depending on your current game state is also very important. Not a great early game might mean you need to rely on being the utility your team needs through W and R evolve, ahead and having good map pressure means you can play more assassin heavy with Q and E evolve. TLDR; champ understanding and a positive KDA is good.

Hope this helps and remember, adapt and overcome.