theres a different kind of satisfaction from destroying reborn's major battles with a different single pokemon for each fight lol... spoiler alert, swoobat and drapion will REALLY get you far.
swoobat's kill count is honestly insane if you play it right. zel's pulse muk fight, aya, pyrous mountain cal, etc etc. terrain seeds' stat boots getting doubled by simple and combined with stored power + charged beam is honestly enough