Double work from my manager and onsite coordinator

So, I was assigned annoying opportunity with the same old irritating onsite team, and to add fuel to apathy, my manager was assigned to support me for its completion. I was expecting anyone else other than my manager for supporting this request because of two reasons, one is that he would suggest the most irrelevant work and the second worrying part is that both onsite coordinator and my manager have ego issues and would often clash on simple inputs. So, on the first day, the opportunity went smoothly with the onsite team suggesting some slides for modifications and some coordination with other teams. At the outset, it seemed simple and straightforward work and I acknowledged the onsite team that it would get completed by tomorrow. However, all these were completely ruined by the manager on the very next day and my manager started to share new suggestions that were completely irrelevant from client requirements. With these new suggestions from my manager, I got two tasks on my list - one is to complete the tasks assigned by the onsite coordinator and the other task is to complete the work suggested by the manager. To know how I managed the workload, please feel free to check out the blog posts in “G R Team Sites”