@Waynegus No, I wouldn’t use both as they are both cure accelerators. I don’t believe it would cause anything to gas out too quickly as the encapsulation of the citric acid would prevent it from breaking down until 130° but it wouldn’t be necessary. If you are looking for the tang just go with Encapsulated Citric Acid, if you are looking for less/none of tang go with the Sodium Erythorbate.
Hope that helped!