Lin is extremely disiplined. You can tell because imagine what type of dicipline it would take to replace your blood with poison(basically what Lin did) and use it as a weapon. …And think about it, when ever you bleed it harms you(you feel pain) so Lin is extremely disiplined to the point where he can take ridiculous amounts of pain(i.e R.E.D Kicks and Maiden Mashers) onto himself on a normal bases in order to cause his opponent pain. His poison instantly kills as soon as it seeps into a persons body and there is no antidote for it(leathal and deadly).
Kyo, K’, Terry, or Rock cannot even come close to taking as much pain as Lin. The only main character that can out class Lin in the pain taking category is Iori because when he goes into Riot of Blood he feels an immense amount of pain(about 2x or 3x the pain), spits of blood, and his entire body riots with pain(meaning in a fight, Iori can take burn knuckles and Repukens no problem).
Lin also can move extremely fast(faster than all of the man characters and enemies) and can probably do so for a long time(energy/endurance).
So yeah, he’s pretty good.