Best Practice for Compensation Change Statements

Summary:

Hi Experts, appreciate your thoughts and suggestion here as we have some complicated letters requirements from the client. They have 5 compensation plans for different populations (i.e. default plan for all the employees apart from those Asset Management, a plan specifically for people in Asset Management) and each plan would have salary, bonus, and LTIA as components. They also have 9 countries in scope and letters should be generated in English but in local currency. I will give some details below but appreciate your advice on what could be the best practice to reduce errors in build and sustainable for