2 parallel calls or 5?

What’s the best practice here? If it’s a fresh list, should you start off slow?

@buenaparkmark we recommend choosing a parallel call number based on your connect rate. I’d recommend 2 or 3 parallel calls for connect rates between 7 and 12% and 4 or 5 parallel calls for connect rates under 5%. Very rarely will you have to go about 5 parallel calls, only for extremely low connect rates.