Electric STAB is not the best STAB in the world. It gets absorbed by a majority of Pokemon. Zapdos may have good SAtk, but it really is much better off running a Specially Defensive set. Offensive sounds cool, but remember that Electric moves are not very common in the metagame outside of Thunder Wave. Volt Switch can be abused, but most Rotom-W can abuse Hydro Pump or Will-Wisp which will do huge damage to this guy. A rain boosted Hydro Pump will destroy an Offensive Zapdos. I think Zapdos wil stay in the same rank. Lightening Rod is a great ability, but it's probably not enough to move Zapdos up itself to A Rank. It should stay where it belongs.
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