Which is the most recommended Display Order for FSRS?

If you are studying your cards when they are due, there is no “most recommended” Display Order. FSRS doesn’t need you to study your cards in any particular order.

For overdue / backlog cards – irrespective of FSRS – you may want to choose an order that maximizes your chance of success, however you define that. The table that sorata posted always looks like gobbledygook to me, and it’s somewhat useless without any explanation – but the overall takeaway is: what order you choose depends on what you want to prioritize. For instance, Descending Retrievability gives the highest average retention (94.9%), which is why that is routinely recommended for backlog studying.