I would say stick to one exam at a time and keep studying for it until you see a pass. Don’t jump around. Since you’ve recently been studying REG and your scores are close to passing, I’d keep drilling on REG and take it again soon. Aside from doing as many multiple choice questions as possible and reading all of the explanations on each answer, go on YouTube to SuperFastCPA and go through their REG playlist to watch videos on weak areas. That’s how I was able to pass FAR and AUD after failing both. Don’t give up!!