The Dark Jedi that Revan fought onboard the Star Forge were by no means special, but I wouldn't call them weak either. They were stronger than your average Jedi during the Mandalorian Wars era, and their powers are amplified by the Star Forge's nexus of Dark Side Energy.
That being said, while Revan did kill dozens of Dark Jedi during his trek of the Star Forge, there is absolutely no evidence to support him fighting dozens at a time. Your quote is meaningless, we know there are "many" warriors that opposed Revan on the Star Forge. It does not mean what you are implying.
Not only that, but on a "thin lit walkway" the Dark Jedi do not have the normal advantages posed by a large group of Force Sensitives. At maximum, one or two of these warriors could stand side-by-side on the walkway, they couldn't flank Revan nor apply effective teamwork.
Don't get me wrong--It's a very impressive feat, something that only a higher caliber swordsman could accomplish, but it's not something outside of General Grievous's capabilities, much less outside of the capabilities of *three* Jedi Swordsmiths of that caliber.
For the sake of comparison, I'd redirect you to the Legacy comics. Shado Vao and Antares Draco took on a couple dozen Sith during their expedition to Korriban. There were two of them, but they were also surrounded, flanked, and the numbers were arguably greater than what Revan faced at any single time on the SF.
It's a nice try, but Revan can't take three high-end master level opponents at the same time. Hell, Anakin and Dooku probably wouldn't be able to either without favoring circumstances on their side.