Ah Philip I was afraid of that at first to. But Ambipom has such a wide movepool it cannot be predicted right every single time. For example, I have been testing Ambipom for the past days now and I notice that people indeed go to Heatran to wall Ambipom. For this reason I am using Low Kick instead of Ice Punch and Fake Out + Low Kick will take out Heatran. You can use Payback to hurt Rotom-a versions or Thunderpunch for Gyarados. What I'm trying to say is that this set might become well known, it still is unpredictable since there are so many (effective) options Ambipom could run.