His battle precognition is stated to be superior then even the greatest Echani:
"The Echani rely heavily on hand-to-hand combat and personal shield technology, and they had their asses handed to them by Revan during the Jedi Civil War, because, not surprisingly, there weren't many people able to face Revan across a battlefield and survive the encounter. The greatest among the Echani are said to be able to read their opponent's moves so ell they can predict the path of a battle several seconds, sometimes even minues in advance, by gauging their opponent's fighting style, heart rate, and ther movements in combat. In many ways, the Echani see combat as a rapid dejarik game, calculating feints, attacks, and dodges with a speed that few can surpass."
―Chris Avellone (KOTOR Designer)
"It is the way of the Echani to be able to read their opponents - to know where an opponent is going to strike before it connects, anticipate it, and then strike against them. Echani battles are fought several minutes in advance - in many ways, it is much like the game of dejarik played in the core systems. The most advanced among the Echani are able to predict the course of battles by months, and the most revered are said to be able to predict the path of wars. Only Revan ever demonstrated such a skill in war. And even as he slaughtered us, the Echani still respected him."
―Brianna (Star Wars Knights of the Old Republic: The Sith Lords)
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He demonstrated this by utterly slaughtering the Imperial Guard:
"Still, the slight stumble gave Revan enough time to draw his lightsaber and go on the offensive. He came in with a high, overhand chop-obvious feint meant to draw the defenses of his opponent downward, leaving his legs exposed to quick slash follow up.
The guard recognized the familiar ploy, countering it by parrying the overhand chop then quickly dropping his blade low to intercept the inevitable slash at his legs. Only Revan didn't go for his legs. Anticipating that his opponent's defenses would go low, he kept his blade up high, allowing him to end the battle with horizontal cut across the man's exposed throat."
―Star Wars The Old Republic: Revan
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He also slaughters countless Echani thanks to his precognition:
"Only Revan ever demonstrated such a skill in war. And even as he slaughtered us, the Echani still respected him."
―Brianna (Star Wars Knights of the Old Republic: The Sith Lords)