I think the first one. All of them, especially Zong can defend Ice and dragon attacks trown at Garchomp.
Second is good, but Electivire can switch in Kiss' Thunder Wave get a boost and sweep easly.
I have a question, is Cross Poison REALLY necessary for Crobat? The only super effective it can land is against Grass, which Aerial Ace can do the same, Cross Poison % to induce Poison can annoy Crobat's Hypnosis, high Critical Hit ratio is fine, but they never seem to happen since I hardly use this move, especially due to many Steel Pokémon around. I just use Cross Poison against Water Pokémon which switch easly into Crobat, but I'm better U-Turning than try to Critical Hit against it. So Cross Poison is just a last resort move. I'm thinking to teach Crobat Taunt in place of Cross Poison.
Second is good, but Electivire can switch in Kiss' Thunder Wave get a boost and sweep easly.
I have a question, is Cross Poison REALLY necessary for Crobat? The only super effective it can land is against Grass, which Aerial Ace can do the same, Cross Poison % to induce Poison can annoy Crobat's Hypnosis, high Critical Hit ratio is fine, but they never seem to happen since I hardly use this move, especially due to many Steel Pokémon around. I just use Cross Poison against Water Pokémon which switch easly into Crobat, but I'm better U-Turning than try to Critical Hit against it. So Cross Poison is just a last resort move. I'm thinking to teach Crobat Taunt in place of Cross Poison.