Aegislash:
the weakness policy serves to counter physical dragapult and spam the shadow sneak
Terrakion:
it serves to exchange case between bisharp or hydreigon
Seismitoad:
Stealth Rock and a speed to pass other seismitoads
Clefable:
just how to switch to dark type pokémons and healer
Rotom Mow:
counter ground Pokémon and serve as a pivot
sorry if I don’t have a lot of information and that is the first time I’m doing this