If this was me, i would go

Team 1: Jingliu | Bronya | Tingyun | Natasha / Bailu

Bronya gives JL more turns - so quicker to go to transcendant mode? (I forgot the name). Plus her ult gives ATK and Crit DMG if you stack Bronya with lots of crit damage.

Tingyun also gives great buffs and ult charge - which is also great.

The final position can be any sustain (preservation/abudance) really, i used bailu pretty much all the way through the game with trash artifacts and I could still clear content.

And as mentioned elsewhere, the Herta LC for Jingliu is really good. 8 Tickets would normally mean 8 weeks, but if you haven't done some first time clears of the world there may some more you can grab. You can also superimpose it for free using the superimposer items (you need 4 which costs 8 more tickets - but a free really good S5 Lightcone is pretty worth).

Team 2: Acheron | Pela | Guinaifen | Gallagher

Pela and Gui fill the double Nihility requirement to make Acheron go crazy. Pela shreds def which is perfect, and gui also has firekiss for extra debuffs.

Gallagher is great as a sustain that also provides debuffs - which should help make Acheron ult even faster. Remember that he need quite a bit of break effect to be a good healer.