Okay, so I've decided that TPM Gui-Gon is not prime Qui-Gon, due to a plethora of quotes indicating that his age has diminished his overall combat performance by a significant extent. I know that Antoine Bandele in his videos considers Jinn's prime as when he apprentices Xanatos, but that's way too early and unpredictable. I would say that around the start of the Jedi Apprentice series, or approximately a decade before the events of TPM, would be Jinn's "prime", in that it presents Jinn before his physicality begins to degenerate. In the Jedi Apprentice series, Jinn engages in a number of duels with Xanatos, all of which show no sign of fatigue or stamina issues, despite both combatants engaging for significant lengths of time (albeit with Jinn being a clear superior to Xanatos). In terms of whether Jinn's pure swordsmanship abilities improved or declined over the decade leading up to TPM, the novelisation implies that Jinn's saber skills had weakened, and that any edge he had (if any) was through experience:
Qui-Gon was nearing sixty; his youth was behind him and his strength was beginning to diminish. His edge now, to the extent that he had one, came from his long experience and intuitive grasp of how an adversary might employ a lightsaber against him.
-TPM Novelisation
Surely then, a decade prior around the start of the Jedi apprentice series, Jinn's strength was still intact, and although he didn't have all of his youth, he still would be in way better shape for extended dueling periods than his TPM incarnation. In addition, there's a handful of quotes that support this basic premise by highlighting Jinn's age as a major, if not primary, factor in the deterioration of Jinn's overall combative ability. These are provided below:
He was the best swordsman Obi-Wan had ever seen, but he was growing old.
-TPM Novelisation
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His opponent was strong and had tested him severely. He was getting old, he decided, and he did not like the feeling.
-TPM Novelisation
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The final battle with Darth Maul in the Theed power generator was fast, furious, and fatal. Qui-Gon, a master duelist by anyone's standards, no longer had the stamina of youth.
-The New Essential Guide to Characters
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The Jedi activated their lightsabers, and Maul noticed Qui-Gon Jinn's blade flashed a fraction of a second after Obi-Wan's.
The old Jedi's getting slow.
-The Wrath of Darth Maul
We could perhaps attempt to compare this to a quote from one of Jinn's duels with Xanatos, though it could be argued that the perspective is that of Obi-Wan's:
Qui-Gon's grace and power were astounding as time and time again he met Xanatos with his thrusting lightsaber, protecting himself and Obi-Wan from blows.
-Jedi Apprentice: Dark Rival
As mentioned before, in the Jedi Apprentice series, as far as I know, Jinn's stamina is never displayed as an issue. Additionally, the first quote I've provided in this post points heavily that his skills as a swordsman, especially in terms of strength and speed, were diminishing, and had to be replaced with experience and intuition. Though, JA (Jedi Apprentice) Jinn, a decade younger, would have nonexistent stamina issues relative to his TPM incarnation, without TOO much of a downgrade in experience. Again, there's a plethora of quotes indicating that the primary reason for the deterioration of Jinn's overall combative performance was his age and flagging stamina.
Originally posted by Intr3pId
Sora's accolade pertaining to his status as one of the greatest lightsaber instructors of all time is indisputable. Neither Qui-Gon nor Agen are praised similarly in an out-of-universe source, to my knowledge. So Sora wins in a battle of accolades.
In regards to the incorrectly sourced quote, it comes from the New Essential Guide to Characters, which is an out-of-universe accolade stating that Jinn is a master duelist by anyone's standards. Combined with the heavy number of quotes solidifying Jinn as a master duelist and being one of the best in the Order is hard to argue against, really. Anyway, this point has run its course, as you have stated yourself, so we'll leave it as is for now.
For my interpretation of the Tantooine duel, note first:
The Jedi meets my first blow, blocking it. He has expected my flying maneuver.
If an opponent can read you, the fight is over. I don't like that the Jedi was perfectly prepared for my first blow. Within seconds, I throw away my usual combinations and strategies. This Jedi seems to know how I will move before I do.
-Episode I Journal: Darth Maul
It's a bit of a stretch, but Maul throws away his "usual combinations and strategies" within seconds of the duel starting. Why else would he do that, unless he considered his standard approach as compromising him? Jinn is also said to have "almost" taken Maul off-guard. Presumably, being taken off-guard means making a mistake that Jinn could exploit to kill Maul. This all happens within seconds of the duel beginning, it seems. Take it as you will.
Originally posted by Intr3pId
That Qui-Gon is better than Anoon is obvious. But Anoon is utterly featless, and nothing implies he was anything more than a skilled swordsman. Aayla would beat him. Fighting evenly with Quinlan is better than whatever accolades he has to his name.
Anoon Bondara being utterly featless is utterly incorrect:
-The Complete Star Wars Encyclopedia
He's defined by an out-of-universe authority as "one of the best fighters and duel instructors in the Jedi Order. He also doesn't get stomped by Maul, as indicated by the fact that Maul was unable to bring down Bondara's guard despite "doubling" his efforts. Another in-universe accolade cements this even further:
Always still and complacent as a pool of unknown depth, he was nevertheless one of the best fighters in the order.
Darth Maul Shadow Hunter
Originally posted by Intr3pId
Gonna need a quote/scan with source as well for the ''evidence'' as well as him practicing Juyo.Post the source for Anoon utilizing Juyo first.
-Jedi Academy Training Manual
Bondara is also a Weapon Master:
To provide context for the rank of Weapon Master:
Only a handful were ever elevated to the rank of Jedi Weapons Master, and these were revered for their skills.
-Complete Star Wars Encyclopedia
As for the evidence regarding Bondara as being the temple instructor before Cin Drallig, it comes from Wookiepedia:
In both of Bondara's appearances he is described as having lightsaber skills second to none. This has led some to hypothesize that Anoon Bondara was the Jedi Battlemaster prior to Cin Drallig. The information mentioned above, the fact that he was the lightsaber instructor to Jedi Initiates and Padawans such as Obi-Wan Kenobi, and that he died in 32 BBY, the same year Cin Drallig became Battlemaster, are cited by some to support this theory.
It seems pretty solid. Anyway, as shown above, Bondara is confirmed by an out-of-universe source as one of the best fighters and duel instructors in the Order, meaning he presumably mastered all forms of lightsaber combat, or enough to adequately teach Jedi the technical aspects of each form. He's also a confirmed Juyo specialist, a form that only extremely talented Masters are capable of mastering. And Jinn is solidly > above him. And unlike Jedi like Secura, or equals on her level such as Quinlan Vos or Tholme, Bondara is not only confirmed as one of the best duelists and instructors in the Jedi Order, but also a Weapon Master and Juyo specialist. Bondara is > Secura or Quinlan Vos, due to having better accolades, and Jinn is one tier ahead of Bondara, making Jinn at a stomping level against Vos and Secura, at least in terms of sabers, and therefore comparable to Agen Kolar. To further cement this, Agen Kolar is still < Maul.