I played on intense mode so here's my result.
Easy:
Amber. The field was honestly like reborn charlotte field for real. I think volcanic field(the field we double battle geara/zetta) would greatly fit for the place and the buff. It gives more a heating feeling.
Crawli needed a bit buff considering many said that it was easy. Especially pokemon with vivillion or other pokemon with setup. Still through, without perparing or just being too cocky, crawli can be actually be a pain. Still through, a lot have complained for being easy.
Normal: Venam,Soul Keta(??) Marianette, Narcissa, Angie.
Hard
Keta. In for real, if you don't have a xatu/Medicham/Swoobat perhaps. You will be defeated hard with only two of his pokemon. Maybe even one.
And still is difficult considering the moveset really. Just me through, if you have these pokemon i said above, you will have a better time.
And valaire wasn't hard for me, but still through. The field was overdone a bit there. Maybe set some pokemon in the wild so can counter some of valaire pokemon for bit more help? That's just me.