Primal Raids are some of the hardest in Pokémon GO, so it's important to try to go into a raid that has a relatively full lobby, as more trainers will better your chances of succeeding. Primal Pokémon can have a CP of more than 90,000, so be sure to take your most powerful Pokémon into your raid as well, so your team will stand a chance if there aren't many other people in the lobby.

You can also invite friends to the raids using Remote Raid Passes if you're feeling that your lobby is a little small. This will also help better your chances. Be sure to also prepare your team for the raid ahead of time so you don't get cut off while in the lobby preparing for the raid.