The thing about auro is that you either make a really bad team based around him reincarnating stuff or you ignore the reincarnations and treat them like rockoids in a throw team.
I’ve done the latter and I think it’s the only way to use him competitively. You can do some nice combos with a line of something like auro, atra, aegis and a stun bomber, but it’s hard to do and not that good.
Trust me, I’ve tried a lot to make him work. He just conflicts too much to use fully