We would like to automatically add watchers/followers to a request once a field is updated. For example, if a request priority is changed from x > Critical, then add Users A, B, C to the follow list. Is there any way to achieve this? I've attempted this by having a form rule that sets the users in the "Users to notify" field, however this would clear any previous values assigned to that field.

Let me know if you have any suggestions thank you.