The team is based around two settings, Tr and Tailwind. Stakataka is the main abuser of Tr, but doesn't always have to be brought. It pairs best with Cresselia, as Helping Hand allows Rock Slide to tear through teams, Gyro Ball to obliterate single targets, and Eq to work as both a secondary spread move, or massive single target damage Vs Steel types. Skill Swap also allows Cresselia to both pass levitate to Stakataka, or remove annoying abilities on the opposing side of the field then lastly Ice Beam nailing Landos and other weak on switch. Min speed it ran to under pace Lonely Stakataka, or speed tie with others. Cresselia also pairs exceptionally well exceptionally well with CharizardY, removing Heatrans, Flash Fire and reseting Sun with Skill Swap, boosting Heatwave massivly, and Flamethrower to unimaginable levels, but most importantly, allows Charizard to outpace faster threats, such as Koko, Lando (unless running -spe nature) and others with Tr. The extra Hp provides much needed bulk, allowing it to live 252 Atk Jolly Double Edge from M.Salamence and eat hits more easily in general both physically and specially, appreciating Landos support more. Ice Beam also helps weaken Dragons the Charizard.Y. CharizardY also supports Stakataka in helping Vs fat Steels, such as Ferrothorn and Celesteela and bulky Waters, with Solar Beam weakening significantly, or Helping Hand boosted often removing them from the match. Fini is the last potential Tr abuser, and it probably the least used, as it does not synergise well with CharizardY due to Sun (though is nice Vs fat Dragons) and doesnt help deal with bulky Waters for Stakataka. However while laddering and looking at Battle Spot Doubles sample teams, not many teams had a Water resist, and main way of dealing with Fini was with faster Electric types, and Fini can switch in both Fighting and Water moves for Stakataka while providing Misty Terrain for Sleep and other pesky Status, providing a more defensive element to the core along with Cresselia.

Next is the Tailwind setting. Tailwind works as an option over Tr Vs slower teams that can deal with Stakataka and under speed CharizardY and or Fini in Tr. Tailwind also allows ZardY and Fini to be supported by Zapdos which helps bulkier Water types, which they can stuggle with. This time around, LandoT works as the better 3rd abuser, being able to be paired up with both ZardY and Fini while spamming Rock Slide. While it does not do nearly as much damage, it provides invaluable support with Intimidate and Av. CharizardY is hitting 108 speed to both under pace neutral 0spe LandoT while outpacing Scarf adamant LandoT under Tailwind. Fini is Ev'd to outpace max speed adamant Ttar.

Lastly you can use neither Tailwind or Trick Room, or both in the same match. The team is highly customisable to matches, abusing Stakataka in the beginning, then flipping the switch with ZardY. Zapdos also pairs nicely with Cresselia, with Helping Hand Z-Tbolt Ohkoing M.Kangaskhan and suprising many other threats, and Cress reversing opposing Tr, while Cress also providing Helping Hand Support in Tailwind. Stakataka also makes a great tank, munching on even SE hits and dealing out massive damage, while helping deal with Lele.
Example of this. I lead with Cresselia and CharizardY with Stakataka and Zapdos in the back.
https://replay.pokemonshowdown.com/gen7vgc2018-663106492 (not the best played game ik, still learn a lot)

Landorus is the teams glue, working on either Tr or Tailwind, or neither depending on match up. being a menace with Helping Hand Support from Cresselia, while it helps Vs opposing Lando, or outpacing threats with the support of Tailwind, while Zapdos helps Vs opposing Landos and Bulky waters.

Common leads, though not set and there arent any common or specific teams I can tell so far, Vs certain stuff are:
Zapdos, Landorus Vs Fake Out from M.Kangaskhan
Zapdos, CharizardY
Cresselia, Landorus Vs Fake Out from M.Kangaskhan, Blacephalon
Cresselia, Stakataka Vs no way of stopping Tr, some opposing Tr
Cresselia, CharizardY Vs Rain, some opposing Tr
Cresselia, Zapdos Vs CHALK
Cresselia, Landorus Vs CHALK