Here we go.
So first things first, we all know that Lu Bu’s whole schtick is being way above everyone else in stats so the default assumption is that he just stat stomps and that’s that. In the Lu Bu spin off from which most of the stuff I am about to bring comes from,
he and Dong Zhuo decide to punch each other in the face with Lu Bu being impressed by Dong Zhou’s punch which even drew blood yet DZ pointed Lu Bu at Sun Jian for someone strong. He also later exchanges a series of blows with Dong Zhuo before killing him so this isn’t just Lu Bu holding back a ton (will add the scans for that later).
Now that I’ve established they are comparable and we know it’s not just a stat stomp, in
this link we get Sun Jian’s skill which lets him copy other generals (who are among the best warriors in China, including the best spearman in all of China who was a master at 15, and Mu Shun who has a OHKO move that he can just whip out) and adapt their moves to his own weapon and style by seeing their technique from behind, know whether a move will work on Lu Bu after seeing the goat one shot eight guys without trying, can predict 39+ potential moves Lu Bu can do after seeing 9 one shots, decides their shit doesn’t work even with his comparable stats to Lu Bu, and created Musashi Miyamoto’s “supreme technique” from the Niten Ichi Ryu style 1400 years before Musashi and Kojiro were alive. As the supreme technique of Musashi’s style, this means that Sun Jian would scale to anything living Kojiro could do (since Musashi > living Kojiro) such as incorporating the movements of all wildlife Kojiro saw into his style, sensing how a master’s best technique is done just by stepping in a room where it was performed etc. I’m sure Azontr can get his Kojiro skill Bible for more on that.
Lu Bu has some of
his own skill feats too though they are rather lacking in number because bug muscles are the meta. He is able to make an “impossible shot” for a bow and arrow just by yeeting a giant ass flagpole over an entire army of 30,000 guys, he is specifically stated to counter Sun Jian’s predictions by purposely using an incomplete Sky Eater which is such a bizarre and unfitting stance for his weapon that it can’t be predicted, and experience is “irrelevant” to him. While that is something that sounds like fluff, it actually has basis in the fact that he can read your predictions (as shown by Kojiro, AP is done through “experiencing” the opponent’s moves) and has a move that can’t be predicted. When he was younger and hadn’t even reached his full potential, he went to Rome where he fought against Octavius who has incomparable skill with a sword. Considering the Titanomachy (gladiator tournament to establish the best warrior in Rome) participants (one guy has 249:0 w/l ratio and another is the “masterpiece” of Sparta so Leonidas eat your heart out) come from across Europe, Africa and west Asia (Rome is obviously aware of Alexander’s conquests as far as India), they would know about the skill of such places when making the claim. Octavius is able to tag and harm Lu Bu so Lu Bu casually weaving his sword strikes barehanded and catching his attack is relevant skillwise (sucks that Octavius is a glass cannon).
Note: The site I was grabbing scans from is buggy rn so I’ll add the Titanomachy stuff after.
Fear hax link is
here. Lu Bu terrifies people into submission by taking a walk, scales above Yang Dayan who makes crying babies go quiet with his presence (not even by seeing him), parts 30,000 troops like the Red Sea on Red Hare, spooks Sun Jian and the horses without them even realising he was there, Sun Jian later states he is even scarier when they meet a second time and makes the man sweat from his presence, the sight of him terrifies Sun Jian’s army, him and Sun Jian facing off scare 100,000 soldiers, makes Sun Jian hallucinate his death, an incomplete Sky Eater makes him even scarier and Sun Jian thinks he is guaranteed to die just from fighting him, and the most impressive part is that he scales above Dong Zhuo who can make Wang Yun age a decade or two, turn his hair white and make it fall out just from turning his attention to him.