Purchasing Document Approval Rule Actions

Business would like to amend the Approval actions for Purchasing Document approval from Functional Setup manager and we need to update around 400+ rules to meet the business requirement.

Fore example, we have a rule defined with 4 Action Participants namely Action1, Action2, Action3 & Action4. Now the business requirement is to add a Finance user as First approver on top of Action1. so the action hierarchy should become Fin user, Action1, Action2,Action3 & Action4.

we would like to understand if there is a way to handle this easily in a spreadsheet including sorting the action participants as per current needs. Please advise. otherwise we have to end up updating every run manually and it is more time consuming