>>51041663Water/Fighting is easily resisted by a bunch of OU mons.
>DragapultImmune to Fighting, resists Water
>Slowbro/SlowkingResists both Fighting and Water
>ToxapexResists both Fighting and Water
>PelipperResists both Fighting and Water
>AmoongussResists both Fighting and Water
>Tapu FiniResists both Fighting and Water
It also gets heavily punished by Rocky Helmet (takes 37.5%, 75% if on Garchomp or Ferrothorn), and Zapdos can easily switch in since it resists Close Combat and threatens that 30% chance to paralyze on contact for Surging Strikes.
Single Strike has nearly perfect coverage since it can run an anti-Fairy type attack to round out its coverage. Rapid Strike has trouble covering its threats.