I had a a similar post VIP Chest...What do you pull?. My guild leader advised me that they only open one at a time now because of that. Some crazy math probability thing I saw posted on another thread. So that being said it’s better to open one at a time. Sure you don’t get the gems deal like you do with 10 or 50, but it only took me 5 pulls to get my last Carnex this morning. Ohh…almost forgot. My wife opened 50 this morning and got all stones plus one odd purple troop that is neither the Carnex or Tankbot 2000. Better luck next time.