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>1300 ELO shitters think Ghost is a good coverage type
It's good neutral STAB, but, like Dragon, it's not something you use otherwise.
It's better off with Fighting or Ground coverage for all the rock types which resist both STABs. One lets it hit Fire and Poison types SE, the other lets it hit Normals. It'll probably end up in a low tier, where rock types are more common, so it's going to get wrecked by things like Rest Regirock unless it gets Aura Sphere or something.