The galaxies this works really well in are: treasure trove (MUCH easier to get a spatula and get full items on many champs) and trade sector (great hyper rolling potential to get 3-star Xayah and J4). This comp has never gotten me below third place.
Look for early 2 star J4 or Xayah to play this comp effectively.
In the frontline, you should have Rakan, J4, and Xin Zhao. The back corner should be saved for Ashe or Jhin so they can get the most of the sniper trait. Xayah and Neeko should be on the back-midline along with the other sniper.
I have included one comp version (#3) with the ideal items for each champion in this comp, with alternative items in its description.
This comp is strong against comps that lack armor and healing, this comp is weak against infiltrators and high healing comps.
Jhin should always be the main carry in this comp. If you can manage to get all three ideal items on him, he will do insane damage and heal back nearly as much as he does. 45% healing with the celestial trait PLUS the 45% healing from bloodthirster pairs so well with his insane damage output.
Some alternative items for these champions are: J4 - Red Buff, sword breaker, Xayah - last whisper, hand of justice, Rakan - rabadons deathcap, bloodthirster, locket of the iron solari, dragons claw, redemption, Xin Xhao - dragons claw, locket of the iron solari, Neeko - ludens echo, locket of the iron solari, dragons claw, Ashe - infinity edge, last whisper, Jhin - last whisper, static shiv, guinsoos rageblade. Of course, any extra warmogs on protector champions are extremely good to have, as well, protectors guard on xayah is also extremely strong.