This comp looks to combine Jhin and Teemo as Snipers that deal attack and magic damage respectively.
The item requirements are quite flexible for this comp, so try to go for this comp if you have a good Sniper start with Caitlyn/Ashe, or if you find an early Teemo or Jhin.
Level up on 2 if you are strong and want to start a win streak.
Level up to 5 after the carousel on Round 4 if you want to continue your win streak.
If you were lose streaking up to Round 7, you can level up to 5 if you don't think you can beat the creeps.
Level up to 6 if you are on a win streak during Round 2 or level up to 5 if you haven't yet.
Win streak or lose streak, you should normally catch up to level 6 on Round 2. Roll a small amount if you are very weak and need to stabilize.
Before the fight on Round 1, level up to 7 and roll down if necessary.
7 After raptors, level to 8 if you haven't already and roll down to complete your team. | Fast 8: If you have lots of gold, at 3 level up to 8 and roll down to try and hit your core units.
Teemo and Jhin compliment each other as they can utilize attack and magic damage items respectively. Keep this in mind when itemizing your carries.
Astro will be used in the team, so if you find an early Bard, you can use that to start snowballing.
At level 9, you can either decide to run 2 Mystic or 4 Dark Star.