With over X years of experience as a full stack developer, I bring a robust skill set that includes JavaScript, MySQL, and Node.js which are perfectly suited for your project. Having worked on various data-intensive projects, I understand the importance of tracking and managing data changes efficiently, which is exactly what you need with your dynamic dataset.
Moreover, my extensive experience with AWS makes me an excellent candidate to handle your script deployment in an Amazon Web Services environment. I'm also well-versed in working with other languages such as Python in case you wish to explore alternative options.
In terms of approach, I believe in thorough planning and proactive problem-solving. Hence, I'll begin by fully understanding your dataset structure and needs before implementing a robust node.js script that effectively tracks and stores all data changes while accounting for frequent updates to ensure optimal performance. My aim is to provide you with a well-commented code that would be easy to maintain even if you need to extend it in the future or train other team members.