To decide which ninja to add to your lineup, consider your team's composition and the abilities you require. Some high-ranking and powerful options to consider might be Edo Itachi, 6 Paths Madara, Edo Minato, or Edo Hashirama. However, these may require significant investment, and their availability may be subject to events or other factors. Other options, such as Edo Tobirama, KLM Naruto, or Edo Hiruzen, may also be useful depending on your playstyle and team composition. Ultimately, it is up to your personal preference and strategy. Don't hesitate to experiment and try different combinations until you find the perfect lineup for your playstyle. Good luck!