I have withershade and embla inflorescence. I recently got Fushu and have Tabethe. Lady nifle has introns on her. I’m working on demon wedges which I assume is where I’m falling short. This abyss does not favour her or lumino at all and it’s much harder despite getting through act 2 last season. Being only lvl 70 and below trial rank 60 shouldn’t be too much of an issue because Rebecca got through but this theatre is made for her and hydro. I’ve noticed the game favours pyro, hydro and anemo a lot. Electro and Umbro are essentially the worst elements due to lacking top tier dps units. I’m glad I don’t use sibylle or phantasio. I hope things balance out a bit more soon as lumino has some good characters like fina but right now feels heavily underpowered.
No idea how much of a difference lvl 80 will be.
Sable
It at first looks like this theater favors Psyche, and it does, but the debuffs this time actually favor having Fina as Psyches support. So your best team comp is either Psyche Fina Fushu, or Psy Fina Truffle.
RileyKate37
I’ve found that Psyche is the best for this Theatre, sadly :/ I tried with Rebecca but she wasn’t good with bosses—I’ve done a couple combos so far, current one is Psyche + Rebecca + Fushu, but I’ve used Fina and Truffle at times as well. Psyche is consistently needed for me to get through the levels, tho—hopefully you can get a good build on her in the next two weeks, and/or that the next Theatre will be Lumino!
Funtinari
Read the description for buff and debuffs. Anemo and Hydro are doing 400% dmg right now meanwhile Nifle is doing half damage. So your right it is an uphill battle.