Answers to this problem will vary. Much of the overall reason as to why the elements were not discovered in order of abundance in the Earth's crust is because not all of the most abundant elements are easy to work with in a lab. In general, the elements were discovered in an order based on how easy they were to study in labs and how easily they could be isolated from other elements.
Work Step by Step
Your answer to this question may be different, and there will be many acceptable answers. This can be approached from the perspective of how elements may be isolated in a lab, or how they may be sampled originally, or some other creative reason.