It's just not good at this point. YZG is too big and smacks Gengar for Weakness, Ability lock isn't as important is Item lock when Night March and Bees/Plume go off in one turn, and Gengar's hit-and-run attack doesn't do enough damage. With Virbank City Gym back in the day, it showed a little more promise, but not in today's format. Sorry homie.