If you want to continue using your current account, then play story mode. Story mode gives you some decent SR kamihime. Collect as many jewels as you can and spend them on gachas that have at least 3 SSR kamihime/ediolon. Also participate in the raid events to get SSR eidolon and weapons in order to strengthen your team. It may take a while to get a good team, but with patience and some luck, you will get a good team.