Amaria has a lot of low tier pokemon, like Lanturn, Ludicolo and Lapras, yet those are deadly on her field. And basically this, this represents Reborn's difficulty. You could give Elias a full team of Arceus, but that would be artificial difficulty. That's the magic of Reborn and the field system, it creates far more interesting situations than just battling OP pokemon
Maybe greed could be Persian, since you know. Pay day?!?!?!??!?!