Aurora Store is way too unreliable and is nearly unusable. I have been using APKMirror so far and while it is okay, it is somewhat annoying that Obtainium can not directly download from there whereas it can with APKPure. I wanted to know the security level of APKPure in comparison to APKMirror.
Never heard anything bad about it so should be safe although I prefer to uso apk mirror because of its reputation