You are isekai'd into the Nasuverse right after Artoria Pendragon draws Caliburn from the stone, taking upon the mantle of King Arthur, and starting her journey to fight Vortigern, unite Britain, and usher her realm into an era of prosperity. With your meta knowledge, what would you do to change the course of the story?
Assume you have an average body for that time period, nothing Gawain or Lancelot tier, but you do have mana circuits, and a body that could be trained to keep up with the lower ranking members of the Round Table.