You definitely got to use Cloyster more than I did lol. Gholdengo is specs because The combo is to just run murkrow next to it and spam Haze next to it after it uses make it rain first. You get to just set tailwind + make it rain then haze the next turn so you can keep hitting Neutral Make it rains. Ground tera is there for the Archaludons since otherwise you have no way to deal with it and Gholdengo + Murkrow pretty much makes that lead easy for you.