My top three duels are up there ^^^ somewhere. My #4 would be Duel of the Fates. It's aptly named as the outcome determines Anakin's fate, but not in the sense of Anakin's fate being altered in being trained by Qui-Gon as compared to being trained by Obi-Wan. Anakin's fate laid in the result of whether Maul won the duel or not. If Maul wins, not only is Anakin likely not trained, but Palpatine has no need to start grooming a new apprentice. The only issue I have with this duel was making Maul inept for a few moments so Obi-Wan could appear powerful and win the duel. Maul not only had the high ground, but he had Obi-Wan in every possible strategic disadvantage, yet somehow despite Maul's immense skill and ability, he cannot figure out what's going on as Obi-Wan launches himself out of the pit, collects Qui-Gon's lightsaber, and gets sliced in half.